STARTING WITH PYTHON3 – The very beginning – part 9

Journal: uffmm.org,
ISSN 2567-6458, July 24-25, 2019
Email: info@uffmm.org
Author: Gerd Doeben-Henisch
Email:gerd@doeben-henisch.de

CONTEXT

This is the next step in the python3 programming project. The overall context is still the python Co-Learning project.

SUBJECT

In this file you will see a first encounter between the AAI paradigm (described in the theory part of this uffmm blog) and some applications of the python programming language. A simple virtual world with objects and actors can become activated with a free selectable size, amount of objects and amount of actors. In later post lots of experiments with this virtual world will be described as well as many extensions.

SOURCE CODE
Main file: vw4.py

The main file ‘vw4.py’ describes the start of a virtual world and then allows a loop to run this world n-many times.

Import file: vwmanager.py

The main file ‘vw4.py’ is using many functions to enable the process. All these functions are collected in the file ‘vwmanager.py’. This file will automatically be loaded during run time of the program vw4.py.

COMMENTS

comment-vw4

DEMO

TEST RUN AUG 19, 2919, 12:56h

gerd@Doeben-Henisch:~/code$ python3 vw4.py
Amount of information: 1 is maximum, 0 is minimum0
Number of columns (= equal to rows!) of 2D-grid ?4
[‘_’, ‘_’, ‘_’, ‘_’]

[‘_’, ‘_’, ‘_’, ‘_’]

[‘_’, ‘_’, ‘_’, ‘_’]

[‘_’, ‘_’, ‘_’, ‘_’]

Percentage (as integer) of obstacles in the 2D-grid?77
Percentage (as integer) of Food Objects in the 2D-grid ?44
Percentage (as integer) of Actor Objects in the 2D-grid ?15

Objects as obstacles

[0, 2, ‘O’]

[0, 3, ‘O’]

[1, 2, ‘O’]

[2, 3, ‘O’]

Objects as food

[0, 0, ‘F’, [0, 1000, 100]]

[1, 1, ‘F’, [1, 1000, 100]]

[2, 0, ‘F’, [2, 1000, 100]]

[2, 2, ‘F’, [3, 1000, 100]]

[3, 0, ‘F’, [4, 1000, 100]]

[3, 3, ‘F’, [5, 1000, 100]]

Objects as actor

[1, 3, ‘A’, [0, 1000, 100, 500, 0]]

[3, 2, ‘A’, [1, 1000, 100, 500, 0]]

[‘F’, ‘_’, ‘O’, ‘O’]

[‘_’, ‘F’, ‘O’, ‘A’]

[‘F’, ‘_’, ‘F’, ‘O’]

[‘F’, ‘_’, ‘A’, ‘F’]

END OF PREPARATION

WORLD CYCLE STARTS

—————————————————-
Real percentage of obstacles = 25.0
Real percentage of food = 37.5
Real percentage of actors = 12.5
—————————————————-
How many CYCLES do you want?25
Singe Step = 1 or Continous = 0?1
Length of olA 2

—————————————————–

WORLD AT CYCLE = 0

[‘F’, ‘_’, ‘O’, ‘O’]

[‘_’, ‘F’, ‘O’, ‘A’]

[‘F’, ‘_’, ‘F’, ‘O’]

[‘F’, ‘_’, ‘A’, ‘F’]

Press key c for continuation!c
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Updated energy levels in olF and olA
[1, 3, ‘A’, [0, 1000, 100, 500, -1]]

[2, 1, ‘A’, [1, 1000, 100, 500, 8]]

[0, 0, ‘F’, [0, 1000, 100]]

[1, 1, ‘F’, [1, 1000, 100]]

[2, 0, ‘F’, [2, 1000, 100]]

[2, 2, ‘F’, [3, 1000, 100]]

[3, 0, ‘F’, [4, 1000, 100]]

[3, 3, ‘F’, [5, 1000, 100]]

Length of olA 2

—————————————————–

WORLD AT CYCLE = 1

[‘F’, ‘_’, ‘O’, ‘O’]

[‘_’, ‘F’, ‘O’, ‘A’]

[‘F’, ‘A’, ‘F’, ‘O’]

[‘F’, ‘_’, ‘_’, ‘F’]

Press key c for continuation!c
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Updated energy levels in olF and olA
[1, 3, ‘A’, [0, 900, 100, 500, -1]]

[2, 1, ‘A’, [1, 900, 100, 500, 0]]

[0, 0, ‘F’, [0, 1000, 100]]

[1, 1, ‘F’, [1, 1000, 100]]

[2, 0, ‘F’, [2, 1000, 100]]

[2, 2, ‘F’, [3, 1000, 100]]

[3, 0, ‘F’, [4, 1000, 100]]

[3, 3, ‘F’, [5, 1000, 100]]

Length of olA 2

—————————————————–

WORLD AT CYCLE = 2

[‘F’, ‘_’, ‘O’, ‘O’]

[‘_’, ‘F’, ‘O’, ‘A’]

[‘F’, ‘A’, ‘F’, ‘O’]

[‘F’, ‘_’, ‘_’, ‘F’]

Press key c for continuation!c
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Updated energy levels in olF and olA
[1, 3, ‘A’, [0, 800, 100, 500, -1]]

[1, 1, ‘A’, [1, 1300, 100, 500, 1]]

[0, 0, ‘F’, [0, 1000, 100]]

[1, 1, ‘F’, [1, 500, 100]]

[2, 0, ‘F’, [2, 1000, 100]]

[2, 2, ‘F’, [3, 1000, 100]]

[3, 0, ‘F’, [4, 1000, 100]]

[3, 3, ‘F’, [5, 1000, 100]]

Length of olA 2

—————————————————–

WORLD AT CYCLE = 3

[‘F’, ‘_’, ‘O’, ‘O’]

[‘_’, ‘A’, ‘O’, ‘A’]

[‘F’, ‘_’, ‘F’, ‘O’]

[‘F’, ‘_’, ‘_’, ‘F’]

Press key c for continuation!c
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Updated energy levels in olF and olA
[1, 3, ‘A’, [0, 700, 100, 500, -1]]

[2, 0, ‘A’, [1, 1700, 100, 500, 6]]

[0, 0, ‘F’, [0, 1000, 100]]

[1, 1, ‘F’, [1, 600, 100]]

[2, 0, ‘F’, [2, 500, 100]]

[2, 2, ‘F’, [3, 1000, 100]]

[3, 0, ‘F’, [4, 1000, 100]]

[3, 3, ‘F’, [5, 1000, 100]]

Length of olA 2

—————————————————–

WORLD AT CYCLE = 4

[‘F’, ‘_’, ‘O’, ‘O’]

[‘_’, ‘F’, ‘O’, ‘A’]

[‘A’, ‘_’, ‘F’, ‘O’]

[‘F’, ‘_’, ‘_’, ‘F’]

Press key c for continuation!c
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Updated energy levels in olF and olA
[1, 3, ‘A’, [0, 600, 100, 500, -1]]

[1, 0, ‘A’, [1, 1600, 100, 500, 1]]

[0, 0, ‘F’, [0, 1000, 100]]

[1, 1, ‘F’, [1, 700, 100]]

[2, 0, ‘F’, [2, 600, 100]]

[2, 2, ‘F’, [3, 1000, 100]]

[3, 0, ‘F’, [4, 1000, 100]]

[3, 3, ‘F’, [5, 1000, 100]]

Length of olA 2

—————————————————–

WORLD AT CYCLE = 5

[‘F’, ‘_’, ‘O’, ‘O’]

[‘A’, ‘F’, ‘O’, ‘A’]

[‘F’, ‘_’, ‘F’, ‘O’]

[‘F’, ‘_’, ‘_’, ‘F’]

Press key c for continuation!c
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Updated energy levels in olF and olA
[1, 3, ‘A’, [0, 500, 100, 500, -1]]

[1, 1, ‘A’, [1, 2000, 100, 500, 3]]

[0, 0, ‘F’, [0, 1000, 100]]

[1, 1, ‘F’, [1, 300, 100]]

[2, 0, ‘F’, [2, 700, 100]]

[2, 2, ‘F’, [3, 1000, 100]]

[3, 0, ‘F’, [4, 1000, 100]]

[3, 3, ‘F’, [5, 1000, 100]]

Length of olA 2

—————————————————–

WORLD AT CYCLE = 6

[‘F’, ‘_’, ‘O’, ‘O’]

[‘_’, ‘A’, ‘O’, ‘A’]

[‘F’, ‘_’, ‘F’, ‘O’]

[‘F’, ‘_’, ‘_’, ‘F’]

Press key c for continuation!c
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Updated energy levels in olF and olA
[1, 3, ‘A’, [0, 400, 100, 500, -1]]

[1, 1, ‘A’, [1, 1900, 100, 500, -1]]

[0, 0, ‘F’, [0, 1000, 100]]

[1, 1, ‘F’, [1, 400, 100]]

[2, 0, ‘F’, [2, 800, 100]]

[2, 2, ‘F’, [3, 1000, 100]]

[3, 0, ‘F’, [4, 1000, 100]]

[3, 3, ‘F’, [5, 1000, 100]]

Length of olA 2

—————————————————–

WORLD AT CYCLE = 7

[‘F’, ‘_’, ‘O’, ‘O’]

[‘_’, ‘A’, ‘O’, ‘A’]

[‘F’, ‘_’, ‘F’, ‘O’]

[‘F’, ‘_’, ‘_’, ‘F’]

Press key c for continuation!c
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Updated energy levels in olF and olA
[1, 3, ‘A’, [0, 300, 100, 500, -1]]

[1, 1, ‘A’, [1, 1800, 100, 500, -1]]

[0, 0, ‘F’, [0, 1000, 100]]

[1, 1, ‘F’, [1, 500, 100]]

[2, 0, ‘F’, [2, 900, 100]]

[2, 2, ‘F’, [3, 1000, 100]]

[3, 0, ‘F’, [4, 1000, 100]]

[3, 3, ‘F’, [5, 1000, 100]]

Length of olA 2

—————————————————–

WORLD AT CYCLE = 8

[‘F’, ‘_’, ‘O’, ‘O’]

[‘_’, ‘A’, ‘O’, ‘A’]

[‘F’, ‘_’, ‘F’, ‘O’]

[‘F’, ‘_’, ‘_’, ‘F’]

Press key c for continuation!c
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Updated energy levels in olF and olA
[1, 3, ‘A’, [0, 200, 100, 500, -1]]

[1, 1, ‘A’, [1, 1700, 100, 500, -1]]

[0, 0, ‘F’, [0, 1000, 100]]

[1, 1, ‘F’, [1, 600, 100]]

[2, 0, ‘F’, [2, 1000, 100]]

[2, 2, ‘F’, [3, 1000, 100]]

[3, 0, ‘F’, [4, 1000, 100]]

[3, 3, ‘F’, [5, 1000, 100]]

Length of olA 2

—————————————————–

WORLD AT CYCLE = 9

[‘F’, ‘_’, ‘O’, ‘O’]

[‘_’, ‘A’, ‘O’, ‘A’]

[‘F’, ‘_’, ‘F’, ‘O’]

[‘F’, ‘_’, ‘_’, ‘F’]

Press key c for continuation!c
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Updated energy levels in olF and olA
[1, 3, ‘A’, [0, 100, 100, 500, 0]]

[1, 0, ‘A’, [1, 1600, 100, 500, 7]]

[0, 0, ‘F’, [0, 1000, 100]]

[1, 1, ‘F’, [1, 700, 100]]

[2, 0, ‘F’, [2, 1000, 100]]

[2, 2, ‘F’, [3, 1000, 100]]

[3, 0, ‘F’, [4, 1000, 100]]

[3, 3, ‘F’, [5, 1000, 100]]

Length of olA 1

—————————————————–

WORLD AT CYCLE = 10

[‘F’, ‘_’, ‘O’, ‘O’]

[‘A’, ‘F’, ‘O’, ‘_’]

[‘F’, ‘_’, ‘F’, ‘O’]

[‘F’, ‘_’, ‘_’, ‘F’]

Press key c for continuation!c
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Updated energy levels in olF and olA
[1, 0, ‘A’, [1, 1500, 100, 500, -1]]

[0, 0, ‘F’, [0, 1000, 100]]

[1, 1, ‘F’, [1, 800, 100]]

[2, 0, ‘F’, [2, 1000, 100]]

[2, 2, ‘F’, [3, 1000, 100]]

[3, 0, ‘F’, [4, 1000, 100]]

[3, 3, ‘F’, [5, 1000, 100]]

Length of olA 1

—————————————————–

WORLD AT CYCLE = 11

[‘F’, ‘_’, ‘O’, ‘O’]

[‘A’, ‘F’, ‘O’, ‘_’]

[‘F’, ‘_’, ‘F’, ‘O’]

[‘F’, ‘_’, ‘_’, ‘F’]

Press key c for continuation!c
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Updated energy levels in olF and olA
[1, 0, ‘A’, [1, 1400, 100, 500, -1]]

[0, 0, ‘F’, [0, 1000, 100]]

[1, 1, ‘F’, [1, 900, 100]]

[2, 0, ‘F’, [2, 1000, 100]]

[2, 2, ‘F’, [3, 1000, 100]]

[3, 0, ‘F’, [4, 1000, 100]]

[3, 3, ‘F’, [5, 1000, 100]]

Length of olA 1

—————————————————–

WORLD AT CYCLE = 12

[‘F’, ‘_’, ‘O’, ‘O’]

[‘A’, ‘F’, ‘O’, ‘_’]

[‘F’, ‘_’, ‘F’, ‘O’]

[‘F’, ‘_’, ‘_’, ‘F’]

Press key c for continuation!c
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Updated energy levels in olF and olA
[1, 0, ‘A’, [1, 1300, 100, 500, -1]]

[0, 0, ‘F’, [0, 1000, 100]]

[1, 1, ‘F’, [1, 1000, 100]]

[2, 0, ‘F’, [2, 1000, 100]]

[2, 2, ‘F’, [3, 1000, 100]]

[3, 0, ‘F’, [4, 1000, 100]]

[3, 3, ‘F’, [5, 1000, 100]]

Length of olA 1

—————————————————–

WORLD AT CYCLE = 13

[‘F’, ‘_’, ‘O’, ‘O’]

[‘A’, ‘F’, ‘O’, ‘_’]

[‘F’, ‘_’, ‘F’, ‘O’]

[‘F’, ‘_’, ‘_’, ‘F’]

Press key c for continuation!c
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Updated energy levels in olF and olA
[2, 0, ‘A’, [1, 1700, 100, 500, 5]]

[0, 0, ‘F’, [0, 1000, 100]]

[1, 1, ‘F’, [1, 1000, 100]]

[2, 0, ‘F’, [2, 500, 100]]

[2, 2, ‘F’, [3, 1000, 100]]

[3, 0, ‘F’, [4, 1000, 100]]

[3, 3, ‘F’, [5, 1000, 100]]

Length of olA 1

—————————————————–

WORLD AT CYCLE = 14

[‘F’, ‘_’, ‘O’, ‘O’]

[‘_’, ‘F’, ‘O’, ‘_’]

[‘A’, ‘_’, ‘F’, ‘O’]

[‘F’, ‘_’, ‘_’, ‘F’]

Press key c for continuation!c
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Updated energy levels in olF and olA
[1, 1, ‘A’, [1, 2100, 100, 500, 2]]

[0, 0, ‘F’, [0, 1000, 100]]

[1, 1, ‘F’, [1, 500, 100]]

[2, 0, ‘F’, [2, 600, 100]]

[2, 2, ‘F’, [3, 1000, 100]]

[3, 0, ‘F’, [4, 1000, 100]]

[3, 3, ‘F’, [5, 1000, 100]]

Length of olA 1

—————————————————–

WORLD AT CYCLE = 15

[‘F’, ‘_’, ‘O’, ‘O’]

[‘_’, ‘A’, ‘O’, ‘_’]

[‘F’, ‘_’, ‘F’, ‘O’]

[‘F’, ‘_’, ‘_’, ‘F’]

Press key c for continuation!c
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Updated energy levels in olF and olA
[0, 0, ‘A’, [1, 2500, 100, 500, 8]]

[0, 0, ‘F’, [0, 500, 100]]

[1, 1, ‘F’, [1, 600, 100]]

[2, 0, ‘F’, [2, 700, 100]]

[2, 2, ‘F’, [3, 1000, 100]]

[3, 0, ‘F’, [4, 1000, 100]]

[3, 3, ‘F’, [5, 1000, 100]]

Length of olA 1

—————————————————–

WORLD AT CYCLE = 16

[‘A’, ‘_’, ‘O’, ‘O’]

[‘_’, ‘F’, ‘O’, ‘_’]

[‘F’, ‘_’, ‘F’, ‘O’]

[‘F’, ‘_’, ‘_’, ‘F’]

Press key c for continuation!c
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Updated energy levels in olF and olA
[0, 0, ‘A’, [1, 2400, 100, 500, -1]]

[0, 0, ‘F’, [0, 600, 100]]

[1, 1, ‘F’, [1, 700, 100]]

[2, 0, ‘F’, [2, 800, 100]]

[2, 2, ‘F’, [3, 1000, 100]]

[3, 0, ‘F’, [4, 1000, 100]]

[3, 3, ‘F’, [5, 1000, 100]]

Length of olA 1

—————————————————–

WORLD AT CYCLE = 17

[‘A’, ‘_’, ‘O’, ‘O’]

[‘_’, ‘F’, ‘O’, ‘_’]

[‘F’, ‘_’, ‘F’, ‘O’]

[‘F’, ‘_’, ‘_’, ‘F’]

Press key c for continuation!c
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Updated energy levels in olF and olA
[0, 0, ‘A’, [1, 2300, 100, 500, -1]]

[0, 0, ‘F’, [0, 700, 100]]

[1, 1, ‘F’, [1, 800, 100]]

[2, 0, ‘F’, [2, 900, 100]]

[2, 2, ‘F’, [3, 1000, 100]]

[3, 0, ‘F’, [4, 1000, 100]]

[3, 3, ‘F’, [5, 1000, 100]]

Length of olA 1

—————————————————–

WORLD AT CYCLE = 18

[‘A’, ‘_’, ‘O’, ‘O’]

[‘_’, ‘F’, ‘O’, ‘_’]

[‘F’, ‘_’, ‘F’, ‘O’]

[‘F’, ‘_’, ‘_’, ‘F’]

Press key c for continuation!c
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Updated energy levels in olF and olA
[0, 0, ‘A’, [1, 2200, 100, 500, -1]]

[0, 0, ‘F’, [0, 800, 100]]

[1, 1, ‘F’, [1, 900, 100]]

[2, 0, ‘F’, [2, 1000, 100]]

[2, 2, ‘F’, [3, 1000, 100]]

[3, 0, ‘F’, [4, 1000, 100]]

[3, 3, ‘F’, [5, 1000, 100]]

Length of olA 1

—————————————————–

WORLD AT CYCLE = 19

[‘A’, ‘_’, ‘O’, ‘O’]

[‘_’, ‘F’, ‘O’, ‘_’]

[‘F’, ‘_’, ‘F’, ‘O’]

[‘F’, ‘_’, ‘_’, ‘F’]

Press key c for continuation!c
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Updated energy levels in olF and olA
[0, 0, ‘A’, [1, 2100, 100, 500, -1]]

[0, 0, ‘F’, [0, 900, 100]]

[1, 1, ‘F’, [1, 1000, 100]]

[2, 0, ‘F’, [2, 1000, 100]]

[2, 2, ‘F’, [3, 1000, 100]]

[3, 0, ‘F’, [4, 1000, 100]]

[3, 3, ‘F’, [5, 1000, 100]]

Length of olA 1

—————————————————–

WORLD AT CYCLE = 20

[‘A’, ‘_’, ‘O’, ‘O’]

[‘_’, ‘F’, ‘O’, ‘_’]

[‘F’, ‘_’, ‘F’, ‘O’]

[‘F’, ‘_’, ‘_’, ‘F’]

Press key c for continuation!c
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Updated energy levels in olF and olA
[0, 0, ‘A’, [1, 2000, 100, 500, -1]]

[0, 0, ‘F’, [0, 1000, 100]]

[1, 1, ‘F’, [1, 1000, 100]]

[2, 0, ‘F’, [2, 1000, 100]]

[2, 2, ‘F’, [3, 1000, 100]]

[3, 0, ‘F’, [4, 1000, 100]]

[3, 3, ‘F’, [5, 1000, 100]]

Length of olA 1

—————————————————–

WORLD AT CYCLE = 21

[‘A’, ‘_’, ‘O’, ‘O’]

[‘_’, ‘F’, ‘O’, ‘_’]

[‘F’, ‘_’, ‘F’, ‘O’]

[‘F’, ‘_’, ‘_’, ‘F’]

Press key c for continuation!c
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Updated energy levels in olF and olA
[0, 0, ‘A’, [1, 1900, 100, 500, 0]]

[0, 0, ‘F’, [0, 1000, 100]]

[1, 1, ‘F’, [1, 1000, 100]]

[2, 0, ‘F’, [2, 1000, 100]]

[2, 2, ‘F’, [3, 1000, 100]]

[3, 0, ‘F’, [4, 1000, 100]]

[3, 3, ‘F’, [5, 1000, 100]]

Length of olA 1

—————————————————–

WORLD AT CYCLE = 22

[‘A’, ‘_’, ‘O’, ‘O’]

[‘_’, ‘F’, ‘O’, ‘_’]

[‘F’, ‘_’, ‘F’, ‘O’]

[‘F’, ‘_’, ‘_’, ‘F’]

Press key c for continuation!c
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Updated energy levels in olF and olA
[0, 1, ‘A’, [1, 1800, 100, 500, 3]]

[0, 0, ‘F’, [0, 1000, 100]]

[1, 1, ‘F’, [1, 1000, 100]]

[2, 0, ‘F’, [2, 1000, 100]]

[2, 2, ‘F’, [3, 1000, 100]]

[3, 0, ‘F’, [4, 1000, 100]]

[3, 3, ‘F’, [5, 1000, 100]]

Length of olA 1

—————————————————–

WORLD AT CYCLE = 23

[‘F’, ‘A’, ‘O’, ‘O’]

[‘_’, ‘F’, ‘O’, ‘_’]

[‘F’, ‘_’, ‘F’, ‘O’]

[‘F’, ‘_’, ‘_’, ‘F’]

Press key c for continuation!c
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Updated energy levels in olF and olA
[1, 1, ‘A’, [1, 2200, 100, 500, 5]]

[0, 0, ‘F’, [0, 1000, 100]]

[1, 1, ‘F’, [1, 500, 100]]

[2, 0, ‘F’, [2, 1000, 100]]

[2, 2, ‘F’, [3, 1000, 100]]

[3, 0, ‘F’, [4, 1000, 100]]

[3, 3, ‘F’, [5, 1000, 100]]

Length of olA 1

—————————————————–

WORLD AT CYCLE = 24

[‘F’, ‘_’, ‘O’, ‘O’]

[‘_’, ‘A’, ‘O’, ‘_’]

[‘F’, ‘_’, ‘F’, ‘O’]

[‘F’, ‘_’, ‘_’, ‘F’]

Press key c for continuation!c
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Updated energy levels in olF and olA
[1, 1, ‘A’, [1, 2100, 100, 500, -1]]

[0, 0, ‘F’, [0, 1000, 100]]

[1, 1, ‘F’, [1, 600, 100]]

[2, 0, ‘F’, [2, 1000, 100]]

[2, 2, ‘F’, [3, 1000, 100]]

[3, 0, ‘F’, [4, 1000, 100]]

[3, 3, ‘F’, [5, 1000, 100]]

 

STARTING WITH PYTHON3 – The very beginning – part 6

Journal: uffmm.org,
ISSN 2567-6458, July 20-22, 2019
Email: info@uffmm.org
Author: Gerd Doeben-Henisch
Email:
gerd@doeben-henisch.de

CONTEXT

This is the next step in the python3 programming project. The overall context is still the python Co-Learning project.

SUBJECT

Meanwhile I am beginning to combine elements of the python language with some applied ideas (in the last section the idea of cognitive entropy illustrated with the equalization of strings). In this section I address the idea of a simple 2-dimensional virtual world, how to represent it with python. In later sections I will use this virtual worlds for some ideas of internal representations and some kinds of learning in an artificial actor.

Remark: for general help information go directly to the python manuals, which you can find associated with the entry for python 3.7.3 if you press the Windows-Button, look to the list of Apps (= programs), and identify the entry for python 3.7.3. If you open the python entry by clicking you see the sub-entry python 3.7.3 Manuals. If you click on this sub-entry the python documentation will open. In this documentation you can find nearly everything you will need. For Beginners you even find a small tutorial. … Yes, and there is all this and more in the world wide web too.

SZENARIO

Motivation

Because we want to introduce step-wise artificial actors which can learn, show some intelligence, and can work in teams, we need a minimal virtual world to start (this virtual world is a placeholder for the real world later if applied to the real world (RW) by sensors and actors). Although there is a big difference between the real world and a virtual world a virtual world is nevertheless very helpful for introducing basic concepts. And, indeed, finally if you are applying to real world data you will not be able to do this without mathematical models which represent virtual structures. You will need lots of mappings between real and virtual and vice versa. Thus from a theoretical point of view any kind of virtual model will do, the question is only how ‘easily’ and how ‘good’ it fits.

Assumptions Virtual World (VW)

  1. A 2-dimensional world as a grid together with a world clock CLCK. The clock produces periodic events which can be used to organize a timely order.

  2. There is an x and y axis with the root (0,0) in the upper left corner

  3. A coordinate (x,y) represents a position.

  4. A position can be occupied by (i) nothing or (ii) by an object. Objects can be obstacles, energy objects (= Food), by a virtual executive actor, or even more.

  5. Only one object per position is allowed.

  6. It is assumed that there are four directions (headings): ‘North (N)’ as -Y, ‘East (E)’ as +X, ‘South (S)’ as +Y, and ‘West (W)’ as -X.

  7. Possible movements are always only in one of the main directions from one cell to the adjacent cell. Movements will be blocked by obstacle objects or actor objects.

  8. A sequence of movements realizes in the grid a path from one position to the next.

  9. The size of the assumed grids is always finite. In a strict finite world the border of the grid blocks a movement. In a finite-infinite world the borders of the grid are connected in a way that the positions in the south lead to the position in the north and the positions in the east lead to the positions in the west, and vice versa. Therefor can a path in an finite-infinite world become infinite.

  10. A grid G with its objects O will be configured at the beginning of an experiment. Without the artificial actors all objects are in a static world assumed to be permanent. In a dynamic world there can be a world function f_w inducing changes depending from the world clock.

  11. During an experiment possible changes in the world can happen through a world function f_w, if such a function has been defined. The other possible source for changes are artificial actors, which can act and which can ‘die’.

Remark: The basic idea of this kind of a virtual world I have got from a paper from S.W.Wilson from 1994 entitled ZCS: a zeroth level classifier system published in the Journal Evolutionary Computation vol. 2 number 1 pages 1-18. I have used this concept the first time in a lecture in 2012 (URL: https://www.doeben-henisch.de/fh/gbblt/node95.html). Although this concept looks at a first glance very simple, perhaps too simple, it is very powerful and allows very far reaching experiments (perhaps I can show some aspects from this in upcoming posts :-)).

ACTOR STORY
  1. There is a human executive actor as a user who uses a program as an assisting actor by an interface with inputs and outputs.

  2. The program tries to construct a 2D-virtual world in the format of a grid. The program needs the size of the grid as (m,n) = (number of columns, number of rows), which is here assumed by default as equal m=n. After the input the program will show the grid on screen.

  3. Then the program will ask for the percentage of obstacles ‘O’ and energy objects (= food) ‘F’ in the world. Randomly the grid will be filled according to these values.

  4. Then a finite number of virtual actors will be randomly inserted too. In the first version only one.

POSSIBLE EXTENSIONS

In upcoming versions the following options should be added:

  1. Allow multiple objects with free selectable strings for encoding.

  2. Allow multiple actors.

  3. Allow storage of a world specification with reloading in the beginning instead of editing.

  4. Transfer the whole world specification into an object specification. This allows the usage of different worlds in one program.

IMPLEMENTATION

vw1b.py

And with separation of support functions in an import module:

vw1c.py

gridHelper.py(The import module)

EXERCISES

m=int(input(‘Number of columns (= equal to rows!) of 2D-grid ?’))

The input() command generates as output a string object. If one wants to use as output numbers for follow-up computations one has to convert the string object into an integer object, which can be done with the int() operator.

mx=nmlist(n)

Is the call of the nmlist() function which has been defined before the main source code (see. above)(in another version all these supporting functions will again be stored as an extra import module:

printMX(mx,n)

This self-defined function assumes the existence of a matrix object mx with n=m many columns and rows. One row in the matrix can be addressed with the first index of mx like mx[i]. The ‘i’ gives the number of the row from ‘above’ starting with zero. Thus if the matrix has n-many rows then we have [0,…,n-1] as index numbers. The rows correspond to the y-axis.

mx = [[‘_’ for y in range(n)] for x in range(n)]

This expression is an example of a general programming pattern in python called list comprehension (see for example chapters 14 and 22 of the mentioned book of Mark Lutz in part 1 of this series). List comprehension has the basic idea to apply an arbitrary python expression onto an iteration like y in range(n). In the case of a numeric value n=5 the series goes from 0 to 4. Thus y takes the values from 0 to 4. In the above case we have two iterations, one for y (representing the rows) and one vor x (representing the columns). Thus this construct generates (y,x) pairs of numbers which represent virtual positions and each position is associated with a string value ‘_’. And because these instructions are enclosed in []-brackets will the result be a set of lists embedded in a list. And as you can see, it works 🙂 But I must confess that from the general idea of list comprehension to this special application is no direct way. I got this idea from the stack overflow web site (https://stackoverflow.com/questions) which offers lots of discussions around this topic.

for i in range(no):

x=rnd.randrange(n)

y=rnd.randrange(n)

mx[x][y]=obj

A simple for-loop to generate random pairs of (x,y) coordinates to place the different objects into the 2D-grid realized as a matrix object mx.

Demo

PS C:\Users\gdh\code> python vw1.py

Number of columns (= equal to rows!) of 2D-grid ?5

[‘_’, ‘_’, ‘_’, ‘_’, ‘_’]

[‘_’, ‘_’, ‘_’, ‘_’, ‘_’]

[‘_’, ‘_’, ‘_’, ‘_’, ‘_’]

[‘_’, ‘_’, ‘_’, ‘_’, ‘_’]

[‘_’, ‘_’, ‘_’, ‘_’, ‘_’]

Percentage (as integer) of obstacles in the 2D-grid?45

Number of objects :

11

Position :

3 2

Position :

2 3

Position :

3 2

Position :

3 2

Position :

0 1

Position :

2 2

Position :

0 1

Position :

4 3

Position :

0 2

Position :

3 1

Position :

1 4

New Matrix :

[‘_’, ‘O’, ‘O’, ‘_’, ‘_’]

[‘_’, ‘_’, ‘_’, ‘_’, ‘O’]

[‘_’, ‘_’, ‘O’, ‘O’, ‘_’]

[‘_’, ‘O’, ‘O’, ‘_’, ‘_’]

[‘_’, ‘_’, ‘_’, ‘O’, ‘_’]

Percentage (as integer) of Energy Objects (= Food) in the 2D-grid ?15

Number of objects :

3

Position :

3 4

Position :

0 4

Position :

4 1

New Matrix :

[‘_’, ‘O’, ‘O’, ‘_’, ‘F’]

[‘_’, ‘_’, ‘_’, ‘_’, ‘O’]

[‘_’, ‘_’, ‘O’, ‘O’, ‘_’]

[‘_’, ‘O’, ‘O’, ‘_’, ‘F’]

[‘_’, ‘F’, ‘_’, ‘O’, ‘_’]

Default random placement of one virtual actor

Position :

2 2

New Matrix :

[‘_’, ‘O’, ‘O’, ‘_’, ‘F’]

[‘_’, ‘_’, ‘_’, ‘_’, ‘O’]

[‘_’, ‘_’, ‘A’, ‘O’, ‘_’]

[‘_’, ‘O’, ‘O’, ‘_’, ‘F’]

[‘_’, ‘F’, ‘_’, ‘O’, ‘_’]

STARTING WITH PYTHON3 – The very beginning – part 4

Journal: uffmm.org,
ISSN 2567-6458, July 15, 2019
Email: info@uffmm.org
Author: Gerd Doeben-Henisch
Email:
gerd@doeben-henisch.de

Change: July 16, 2019 (Some re-arrangement of the content :-))

CONTEXT

This is the next step in the python3 programming project. The overall context is still the python Co-Learning project.

SUBJECT

After a first clearing of the environment for python programming we have started with the structure of the python programming language, and in this section will deal with the object type string(s).

Remark: the following information about strings you can get directly from the python manuals, which you can find associated with the entry for python 3.7.3 if you press the Windows-Button, look to the list of Apps (= programs), and identify the entry for python 3.7.3. If you open the python entry by clicking you see the sub-entry python 3.7.3 Manuals. If you click on this sub-entry the python documentation will open. In this documentation you can find nearly everything you will need. For Beginners you even find a nice tutorial.

TOPIC: VALUES (OBJECTS) AS STRINGS

PROBLEM(s)

(1) When I see a single word (a string of symbols) I do not know which type this is in python. (2) If I have a statement with many words I would like to get from this a partition into all the single worlds for further processing.

VISION OF A SOLUTION

There is a simple software actor which can receive as input either single words or multiple words and which can respond by giving either the type of the received word or the list of the received multiple words.

ACTOR STORY (AS)

We assume a human user as executing actor (eA) and a piece of running software as an assisting actor (aA). For these both we assume the following sequence of states:

  1. The user will start the program by calling python and the name of the program.
  2. The program offers the user two options: single word or multiple words.
  3. The user has to select one of these options.
  4. After the selection the user can enter accordingly either one  or multiple words.
  5. The program will respond either with the recognized type in python or with a list of words.
  6. Finally asks the program the user whether he/she will continue or stop.
  7. Depending from the answer of the user the program will continue or stop.

IMPLEMENTATION

Here you can download the sourcecode: stringDemo1

# File stringDemo1.py
# Author: G.Doeben-Henisch
# First date: July 15, 2019

##################
# Function definition sword()

def sword(w1):
w=str(w1)
if w.islower():
print(‘Is lower\n’)
elif w.isalpha() :
print(‘Is alpha\n’)
elif w.isdecimal():
print(‘Is decimal\n’)
elif w.isascii():
print(‘Is ascii\n’)
else : print(‘Is not lower, alpha, decimal, ascii\n’)

##########################
# Main Programm

###############
# Start main loop

loop=’Y’
while loop==’Y’:

###################
# Ask for Options

opt=input(‘Single word =1 or multiple words =2\n’)

if opt==’1′:
w1=input(‘Input a single word\n’)
sword(w1) # Call for new function defined above

elif opt==’2′:
w1=input(‘Input multiple words\n’)
w2=w1.split() # Call for built-in method of class str
print(w2)

loop=input(‘To stop enter N\n’) # Check whether loop shall be repeated

DEMO

Here it is assumed that the code of the python program is stored in the folder ‘code’ in my home director.

I am starting the windows power shell (PS) by clicking on the icon. Then I enter the command ‘cd code’ to enter the folder code. Then I call the python interpreter together with the demo programm ‘stringDemo1.py’:

PS C:\Users\gerd_2\code> python stringDemo1.py
Single word =1 or multiple words =2

Then I select first option ‘Single word’ with entering 1:

1
Input a single word
Abrakadabra
Is alpha

To stop enter N

After entering 1 the program asks me to enter a single word.

I am entering the fantasy word ‘Abrakadabra’.

Then the program responds with the classification ‘Is alpha’, what is correct. If I want to stop I have to enter ‘N’ otherwise it contiues.

I want o try another word, therefore I am entering ‘Y’:

Y
Single word =1 or multiple words =2

I select again ‘1’ and the new menue appears:

1
Input a single word
29282726
Is decimal

To stop enter N

I entered a sequence of digits which has been classified as ‘decimal’.

I want to contiue with ‘Y’ and entering ‘2’:

Y
Single word =1 or multiple words =2
2
Input multiple words
Hans kommt meistens zu spät
[‘Hans’, ‘kommt’, ‘meistens’, ‘zu’, ‘spät’]
To stop enter N

I have entered a German sentence with 5 words. The response of the system is to identify every single word and generate a list of the individual words.

Thus, so far, the test works fine.

COMMENTS TO THE SOURCE CODE

Before the main program a new function ‘sword()’ has been defined:

def sword(w1):

The python keyword ‘def‘ indicates that here the definition of a function  takes place, ‘sword‘ is the name of this new function, and ‘w1‘ is the input argument for this function. ‘w1’ as such is the name of a variable pointing to some memory place and the value of this variable at this place will depend from the context.

w=str(w1)

The input variable w1 is taken by the operator str and str translates the input value into a python object of type ‘string’. Thus the further operations with the object string can assume that it is a string and therefore one can apply alle the operations to the object which can be applied to strings.

if w.islower():

One of these string-specifi operations is islower(). Attached to the string object ‘w’ by a dot-operator ‘.’ the operation ‘islower() will check, whether the string object ‘w’ contains lower case symbols. If yes then the following ‘print()’ operation will send this message to the output, otherwise the program continues with the next ‘elif‘ statement.

The ‘if‘ (and following the if the ‘elif‘) keyword states a condition (whether ‘w’ is of type ‘lower case symbols’). The statement closes with the ‘:’ sign. This statement can be ‘true’ or not. If it is true then the part after the ‘:’ sign will be executed (the ‘print()’ action), if false then the next condition ‘elif … :’ will be checked.

If no condition would be true then the ‘else: …’ statement would be executed.

The main program is organized as a loop which can iterate as long as the user does not stop it. This entails that the user can enter as many words or multi-words as he/ she wants.

loop=’Y’
while loop==’Y’:

In the first line the variable ‘loop’ receives as a value the string ‘Y’ (short for ‘yes’). In the next line starts the loop with the python key-word ‘while’ forming a condition statement ‘while … :’. This is similar to the contion statements above with ‘if …. :’ and ‘elif … :’.

The condition depends on the expression ‘loop == ‘Y” which means that  as long as the variable loop is logically equal == to the value ‘Y’ the loop condition  is ‘true’ and the part after the ‘:’ sign will be executed. Thus if one wants to break this loop one has to change the value of the variable ‘loop’ before the while-statement ‘while … :’ will be checked again. This check is done in the last line of the while-execution part with the input command:

loop=input(‘To stop enter N\n’)

Before the while-condition will be checked again there is this input() operator asking the user to enter a ‘N’ if he/ she wantds to stop. If the user  enters a  ‘N’  in the input line the result of his input will be stored in the variable called ‘loop’ and therefore the variable will have the value ‘==’N” which is different from ‘==’Y”. But what would happen if the user enters something different from ‘N’ and ‘Y’, because ‘Y’ is expected for repetition?

Because the user does not know that he/she has to enter ‘Y’ to continue the program will highly probably stop even if the user does not want to stop. To avoid this unwanted case one should change the code for the while-conition as follows:

while loop!=’N’:

This states that the loop will be true as long as the value of the loop variable is different != from the value ‘N’ which will explicitly asked from the user at the end of the loop.

The main part of the while-loop distinguishes two cases: single word or multiple words. This is realized by a new input() operation:

opt=input(‘Single word =1 or multiple words =2\n’)

The user can enter a ‘1’ or a ‘2’, which will be stored in the variable ‘opt’. Then a construction with an if or an elif will test which one of these both happens. Depending from the option 1 or 2 ther program asks the user again with an input() operation for the specific input (one word or multiple words).

sword(w1)

In the case of the one word input in the variable ‘w1’ w1 contains as value a string input which will be delivered as input argument to the new function ‘sword()’ (explanation see above). In case of input 2 the

w2=w1.split()

‘split()’ operation will be applied to the object ‘w1’ by the dot operator ‘.’. This operation will take every word separated by a ‘blank’ and generates a list ‘[ … ]’ with the individual words as elements.

 

 

STARTING WITH PYTHON3 – The very beginning – part 2

Journal: uffmm.org,
ISSN 2567-6458, July 9, 2019
Email: info@uffmm.org
Author: Gerd Doeben-Henisch
Email:
gerd@doeben-henisch.de

CONTEXT

This is the next step in the python3 programming project. The first step can be found here. The overall context is still the python Co-Learning project.

PROGRAMMING TOOLS

First SW-tools to use for programming

In this second session we extend the overview of the possible programming tools, how they are interrelated, and how they work.

In the figure above you can see the windows 10 operating system as the root system for everything else. The win10 system communicates with the PATH-variable and uses this information for many operations. How on can edit this variable has been shown in the last session.

One can activate directly from the win10 system the power-shell with a command-line interface. Entering the right code one can activate from the power-shell either directly a python-shell for python commands or one can activate other programs like the editor ‘notepad’ or ‘notepad++’. With such editors one can edit python scripts, store them, and then run these scripts from the power-shell by calling a python-shell with these scripts as arguments (as shown in the first session).

The python shell allows the direct entering of python commands and gives immediately feedback whether it works and how. Therefore one calls this an interactive shell which is very handy to check quickly some commands and their effects.

Another tool, which we will use in this session, is the integrated script environment (IDLE). This is like the python-shell but with some additional functionalities (see below). The main usage is for editing larger python scripts with a built-in editor and for running these scripts.

THE IDLE TOOL

To use this new tool you can press the windows button to see the list of all apps (programs) available on your computer. Under ‘P’ you will find python 3.7.3 and within python you will find an entry for IDLE. By selecting this item and clicking on the right mouse-button you can select the option to attach this icon to the task bar. If it is there you can use it.

If you start the IDLE tool by clicking on the icon from the task bar it opens as a new python interactive shell with some more options.

A first thing you can do is to ask for the actual path you are in. For this you have to import the python module ‘os’ (operating system) and use the command ‘getcwd()‘ from this module. Entering ‘os.getcwd()‘ in the python command line generates the actual path as output on the next line.

>>> import os
>>> os.getcwd()
‘C:\\Users\\gerd_2\\AppData\\Local\\Programs\\Python\\Python37-32’
>>>

This reveals that the actual path is pointing to the location of the python exe module (on my pc). This is not what I want because I have created in the first session a folder with name ‘code’ in my home directory ‘\Users\gerd_2’. From inside of the IDLE tool it is not possible to change the actual path.  But python as language provides lots of options to do this. One option is described below:

The module os offers several functions. Besides the function ‘os.getcwd()’ which we have used already there is another command ‘os.chdir(pathname)‘. But to directly change the actual path one has to be cautious because the path ‘C:\\Users\gerd_2\code‘ includes the ‘\’-sign, this cannot be read directly by the os.chdir() command. You can surround this problem by using the ‘\’-sign twice: first as an ‘escape sign’ and then as the ‘object sign’, resulting in the following command format: ‘C:\\Users\\gerd_2\\code‘. Entering this nothing is given as a result, and when you repeat the question ‘os.getcwd()’ you will receive as new answer the new path. Here the dialog with the python-shell:

Python 3.7.3 (v3.7.3:ef4ec6ed12, Mar 25 2019, 21:26:53) [MSC v.1916 32 bit (Intel)] on win32

Type “help”, “copyright”, “credits” or “license()” for more information.

>>> import os

>>> os.getcwd()

‘C:\\Users\\gerd_2\\AppData\\Local\\Programs\\Python\\Python37-32’

>>> os.chdir(‘C:\\Users\\gerd_2\\code’)

>>> os.getcwd()

‘C:\\Users\\gerd_2\\code’

>>>

You can see that the python command ‘os.getcwd() has been used twice. If you want to repeat some command you can call-back the command history of the python-shell with the keystrokes ‘ALT+P‘. This recalls the past (P) of the command history.

Comment: In the command

>> os.chdir(‘C:\\Users\\gerd_2\\code’)

I have used the back-slash sign ‘\’ twice to make the string fit as argument for the ‘os.chdir()’ command. As one can learn does python allow another solution, which looks like this:

>> os.chdir(r’C:\Users\gerd_2\code’)

The solution is to use an additional ‘r’ directly before the string ‘…’ telling the python interpreter that the following string has to be understood as a raw string. This works, try it out 🙂

IDLE AND EXECUTION OF A SCRIPT

Now if we are in the target folder for my scripts we can look to all files which are in this folder actually. For this we can use the python command ‘os.listdir()’:

>>> os.listdir()

[‘savesrc.txt’, ‘script1.py’, ‘script1.pyw’, ‘script1b.py’, ‘showargs.py’, ‘threenames.py’, ‘tst1.py’, ‘what.py’, ‘what2.py’, ‘__pycache__’]

>>>

You can detect in this list the python script ‘scrpt1.py’. Entering the name of this script either with .py extension or without will not enable an execution:

>>> script1.py

Traceback (most recent call last):

File “<pyshell#6>”, line 1, in <module>

script1.py

NameError: name ‘script1’ is not defined

From the first session we know that we can start the script within the power-shell directly. For this we have to activate the powershell, have to go into the desired folder ‘code’ …

PS C:\Users\gerd_2> cd code

PS C:\Users\gerd_2\code> dir

Verzeichnis: C:\Users\gerd_2\code

Mode LastWriteTime Length Name

—- ————- —— —-

d—– 04.07.2019 19:03 __pycache__

-a—- 01.07.2019 18:44 182 savesrc.txt

-a—- 01.07.2019 18:41 92 script1.py

-a—- 24.06.2019 23:23 126 script1.pyw

-a—- 24.06.2019 22:43 128 script1b.py

-a—- 04.07.2019 18:51 56 showargs.py

-a—- 28.06.2019 00:29 162 threenames.py

-a—- 24.06.2019 21:16 120 tst1.py

-a—- 24.06.2019 22:49 126 what.py

-a—- 24.06.2019 23:56 136 what2.py

… and then we can start the python-script ‘script1.py’:

PS C:\Users\gerd_2\code> python script1.py

win32

1267650600228229401496703205376

pythonpythonpythonpythonpythonpythonpythonpython

PS C:\Users\gerd_2\code>

But because we will here use the IDLE tool we proceed differently. We open the File-Menue to get the desired file script1.py:

Open file-directory for file search

Then we load  the python-script script1.py in the editor of the IDLE tool:

The text of the script

and then activate the RUN button for execution:

Activate the RUN button to execute the script

The script will then be executed and you will see the effect of the execution in the python shell. This looks the same as when you would have called the script within the power-shell calling  the python-shell.

There is still the other option to get the module running by the import command:

>>> import script1.py

win32

1267650600228229401496703205376

pythonpythonpythonpythonpythonpythonpythonpython

Traceback (most recent call last):

File “<pyshell#7>”, line 1, in <module>

import script1.py

ModuleNotFoundError: No module named ‘script1.py’; ‘script1’ is not a package

>>>

The import call works, but at the same time the python-shell states some error, that ‘script1.py’ is not recognized as a true module. This has to be clarified in the next session.

 

 

 

STARTING WITH PYTHON 3 – The very beginning

eJournal: uffmm.org,
ISSN 2567-6458, July 1, 2019
Email: info@uffmm.org
Author: Gerd Doeben-Henisch
Email: gerd@doeben-henisch.de

CONTEXT

The idea is to give some advice to start with python 3 programming. In other posts I have used an integrated package using WinPython including the integrated  development package  spyder. While such an integrated package offers lots of nice tools it hides the basic structures of your system and of the language. Therefore I decided to start again at a more basic level using only the python language and the windows command shell (I myself are working with an ubuntu system for the normal python programming and for the work with a python web-framework called ‘django’). Because I myself am not too much experienced with the windows 10 environment it challenges me to investigate the win10 environment to some degree.

GETTING STARTED FROM SCRATCH: DOWNLOAD PYTHON

To get a fresh start from scratch I have removed all python stuff from my machine.  Then I have downloadad the newest pythion version for windows from https://www.python.org/. This is python version 3.7.3 in the 32-Bit version. There exists also a 64-Bit version, but because not all the different modules are already prepared for the 64-Bit version the 32-Bit version is more flexible. To learn python this is more than enough. To switch to a 64-Bit version would be simple.

LOCAL WINDOWS ENVIRONMENT

On my machine the installation path is:

C:\Users\gerd_2\AppData\Local\Programs\Python\Python37-32

To test whether python works on your windows machine you can activate the WindowsPowerShell. You will find this shell by klicking on the Windows Icon in the left corner of your laptown whic opens the list of all Windows-Apps (programs).  At the end of this list there are some windows-Apps including the Windows-Power-Shell. I took the first one. By clicking on the right mouse-button I selected to attach the power-shell on the task bar. This allows me to click once on the icon of the power shell and the power shell will open.

Typing the command ‘python’ the first time into the command line will cause an error message, because Windows does not know where to find the command ‘python’. You can do two things: (i) enter the whole path for python or (ii) inform the PATH-variable about the python path.

Enter the whole path worked out:

PS C:\Users\gerd_2> C:\Users\gerd_2\AppData\Local\Programs\Python\Python37-32\python

Python 3.7.3 (v3.7.3:ef4ec6ed12, Mar 25 2019, 21:26:53) [MSC v.1916 32 bit (Intel)] on win32

Type “help”, “copyright”, “credits” or “license” for more information.

>>

Because this procedure is a bit cumbersom I tried the other proposal, to edit the PATH-variable. One proposal (from the community) goes like this:

  1. Open the Start Search, type in “env”, and choose “Edit the system environment variables”:
  2. Click the “Environment Variables…” button.
  3. Under the “System Variables” section (the lower half), find the row with “Path” in the first column, and click edit.
  4. The “Edit environment variable” UI will appear.

I could edit the PATH-variable this way, but ist showed no effect. Therefore I tried another procedure, where one can modify the PATH-variable directly from the power-shell. The needed command has the following format:

$Env:PATH += “;Wanted Path”

This addresses the PATH variable, let the actual content as it is and adds after a semicolon the needed path. With the command

$Env:PATH

you can check the actual values of the variable PATH and after adding your new path

PS C:\Users\gerd_2> $Env:PATH +=”;C:\Users\gerd_2\AppData\Local\Programs\Python\Python37-32″

youcan check again. It worked, I got my new path added to  the variable. But, even more important, now it worked. Enterin in the power shell only ‘python’ it worked:

PS C:\Users\gerd_2> python
Python 3.7.3 (v3.7.3:ef4ec6ed12, Mar 25 2019, 21:26:53) [MSC v.1916 32 bit (Intel)] on win32
Type “help”, “copyright”, “credits” or “license” for more information.
>>>

I also tried the ‘help-option’ like this:

>>> help()

Welcome to Python 3.7’s help utility!

If this is your first time using Python, you should definitely check out

the tutorial on the Internet at https://docs.python.org/3.7/tutorial/.

Enter the name of any module, keyword, or topic to get help on writing

Python programs and using Python modules. To quit this help utility and

return to the interpreter, just type “quit”.

To get a list of available modules, keywords, symbols, or topics, type

“modules”, “keywords”, “symbols”, or “topics”. Each module also comes

with a one-line summary of what it does; to list the modules whose name

or summary contain a given string such as “spam”, type “modules spam”.

I tried e.g.  the ‘modules option:

help> modules

Please wait a moment while I gather a list of all available modules…

__future__ _tracemalloc glob secrets

_abc _warnings gzip select

_ast _weakref hashlib selectors

_asyncio _weakrefset heapq setuptools

From this I selected the  ‘socket’-option:

help> socket

Help on module socket:

NAME

socket

DESCRIPTION

This module provides socket operations and some related functions.

On Unix, it supports IP (Internet Protocol) and Unix domain sockets.

On other systems, it only supports IP. Functions specific for a

socket are available as methods of the socket object.

Functions:

socket() — create a new socket object

socketpair() — create a pair of new socket objects [*]

fromfd() — create a socket object from an open file descriptor [*]

fromshare() — create a socket object from data received from socket.share() [*]

Thus this function works and looks promising.

FIRST PROGRAMMING STEPS

The main idea of using python is to be able to write some program code which then the machine can run. The basic processing steps are

  1. Start python in the power shell by typing  ‘python’
  2. Enter some python code you want to test.
  3. If you want to edit many python commands together then take a text editor and write some text which looks like python code.
  4. The text you enter directly into a python command line or a edited text in a file which you can load both will be handed out to the python interpreter which translate these pyton commands into a byte code which in turn will be run by the python virtual machine (PVM).

It is helpful befor you start programming to generate at least one folder where you will store your python programs. Following the proposal from Mark Lutz (see below references) I generate in my main directory a folder called ‘code’:

PS C:\> cd $HOME

PS C:\Users\gerd_2> mkdir code

Verzeichnis: C:\Users\gerd_2

Mode LastWriteTime Length Name

—- ————- —— —-

d—– 01.07.2019 18:40 code

To edit a first simple program with name ‘script1.py’ I have called the notepad editor in the power shell like this:

PS C:\Users\gerd_2\code> notepad script1.py

In the editor I have typed the following simple text:

# FILE: script1.py

import sys

print(sys.platform)

print(2**100)

x=’python’

print(x*8)

Then I have stored this file in the ‘code’ folder. Wih the command ‘dir’ one can have a look into the ‘code’ folder:

PS C:\Users\gerd_2\code> dir

Verzeichnis: C:\Users\gerd_2\code

Mode LastWriteTime Length Name

—- ————- —— —-

-a—- 01.07.2019 18:41 92 script1.py

To check what happens when I load this script with the python interpreter one can enter the following command:

PS C:\Users\gerd_2\code> python script1.py

win32

1267650600228229401496703205376

pythonpythonpythonpythonpythonpythonpythonpython

STREAM REDIRECTION

One can also redirect the output of the python interpreter from the console into a file:

PS C:\Users\gerd_2\code> python script1.py >savesrc.txt

Then one can again call an editor like notepad to read the content of this file:

PS C:\Users\gerd_2\code> notepad savesrc.txt

CONTENT savesrc.txt:

win32

1267650600228229401496703205376

pythonpythonpythonpythonpythonpythonpythonpython

MODULES

Like many other programming language python organizes larger programs by putting together  smaller programs like building blocks. These blocks are called modules and this strategy  can only work if one follows some rules. Mark Lutz formulates it as follows:

“… a module is mostly just a package of variable names, known as a namespace, and the names within that package are called attributes. An attribute is simply a variable name that is attached to a specific object (like a module).” (Lutz, Mark. Learning Python (S.70). O’Reilly Media. Kindle-Version)

One possibility to fetch a module is to use the import command, either directly in a python console or indirectly as command in a python program text. Thus with going direct to the console:

PS C:\Users\gerd_2\code> python
Python 3.7.3 (v3.7.3:ef4ec6ed12, Mar 25 2019, 21:26:53) [MSC v.1916 32 bit (Intel)] on win32
Type “help”, “copyright”, “credits” or “license” for more information.
>>> import os
>>> os.getcwd()
‘C:\\Users\\gerd_2\\code’

Here the module ‘os’ has been imported and within tis module exists a function ‘getcwd()’ which fetches the actual path you are in. In my case my home directory and there the folder ‘code’. Doing an import with the new file ‘script1.py’ it works like this:

PS C:\Users\gerd_2\code> python

Python 3.7.3 (v3.7.3:ef4ec6ed12, Mar 25 2019, 21:26:53) [MSC v.1916 32 bit (Intel)] on win32

Type “help”, “copyright”, “credits” or “license” for more information.

>>> import script1

win32

1267650600228229401496703205376

pythonpythonpythonpythonpythonpythonpythonpython

Thus the import also causes a run of the script.

If one wants to know which kinds of names are used in the module one can use the command dir():

>>> dir(script1)

[‘__builtins__’, ‘__cached__’, ‘__doc__’, ‘__file__’, ‘__loader__’, ‘__name__’, ‘__package__’, ‘__spec__’, ‘sys’, ‘x’]

TO BE CONTINUED…

Go back to the main page.

SOME HELPFUL REFERENCES

  • Mark Lutz, Learn Python, 2013,5th ed.,Sebastopol (CA), O’Reilly
  • To get the sources: https://www.python.org/
  • Documentation: https://docs.python.org/3/
  • Python Software Foundation (PSF): https://www.python.org/psf-landing/
  • Python Community: https://www.python.org/community/

ACTOR-ACTOR INTERACTION [AAI] WITHIN A SYSTEMS ENGINEERING PROCESS (SEP). An Actor Centered Approach to Problem Solving

eJournal: uffmm.org, ISSN 2567-6458
Email: info@uffmm.org
Author: Gerd Doeben-Henisch
Email: gerd@doeben-henisch.de

ATTENTION: The actual Version  you will find HERE.

Draft version 22.June 2018

Update 26.June 2018 (Chapter AS-AM Summary)

Update 4.July 2018 (Chapter 4 Actor Model; improving the terminology of environments with actors, actors as input-output systems, basic and real interface, a first typology of input-output systems…)

Update 17.July 2018 (Preface, Introduction new)

Update 19.July 2018 (Introduction final paragraph!, new chapters!)

Update 20.July 2018 (Disentanglement of chapter ‘Simulation & Verification’ into two independent chapters; corrections in the chapter ‘Introduction’; corrections in chapter ‘AAI Analysis’; extracting ‘Simulation’ from chapter ‘Actor Story’ to new chapter ‘Simulation’; New chapter ‘Simulation’; Rewriting of chapter ‘Looking Forward’)

Update 22.July 2018 (Rewriting the beginning of the chapter ‘Actor Story (AS)’, not completed; converting chapter ‘AS+AM Summary’ to ‘AS and AM Philosophy’, not completed)

Update 23.July 2018 (Attaching a new chapter with a Case Study illustrating an actor story (AS). This case study is still unfinished. It is a case study of  a real project!)

Update 7.August 2018 (Modifying chapter Actor Story, the introduction)

Update 8.August 2018 (Modifying chapter  AS as Text, Comic, Graph; especially section about the textual mode and the pictorial mode; first sketch for a mapping from the textual mode into the pictorial mode)

Update 9.August 2018 (Modification of the section ‘Mathematical Actor Story (MAS) in chapter 4).

Update 11.August 2018 (Improving chapter 3 ‘Actor Story; nearly complete rewriting of chapter 4 ‘AS as text, comic, graph’.)

Update 12.August 2018 (Minor corrections in the chapters 3+4)

Update 13.August 2018 (I am still catched by the chapters 3+4. In chapter  the cognitive structure of the actors has been further enhanced; in chapter 4 a complete example of a mathematical actor story could now been attached.)

Update 14.August 2018 (minor corrections to chapter 4 + 5; change-statements define for each state individual combinatorial spaces (a little bit like a quantum state); whether and how these spaces will be concretized/ realized depends completely from the participating actors)

Update 15.August 2018 (Canceled the appendix with the case study stub and replaced it with an overview for  a supporting software tool which is needed for the real usage of this theory. At the moment it is open who will write the software.)

Update 2.October 2018 (Configuring the whole book now with 3 parts: I. Theory, II. Application, III. Software. Gerd has his focus on part I, Zeynep will focus on part II and ‘somebody’ will focus on part III (in the worst case we will — nevertheless — have a minimal version :-)). For a first quick overview about everything read the ‘Preface’ and the ‘Introduction’.

Update 4.November 2018 (Rewriting the Introduction (and some minor corrections in the Preface). The idea of the rewriting was to address all the topics which will be discussed in the book and pointing out to the logical connections between them. This induces some wrong links in the following chapters, which are not yet updated. Some chapters are yet completely missing. But to improve the clearness of the focus and the logical inter-dependencies helps to elaborate the missing texts a lot. Another change is the wording of the title. Until now it is difficult to find a title which is exactly matching the content. The new proposal shows the focus ‘AAI’ but lists the keywords of the main topics within AAA analysis because these topics are usually not necessarily associated with AAI.)

ACTOR-ACTOR INTERACTION [AAI]. An Actor Centered Approach to Problem Solving. Combining Engineering and Philosophy

by

GERD DOEBEN-HENISCH in cooperation with  LOUWRENCE ERASMUS, ZEYNEP TUNCER

LATEST  VERSION AS PDF

BACKGROUND INFORMATION 19.Dec.2018: Application domain ‘Communal Planning and e-Gaming’

BACKGROUND INFORMATION 24.Dec.2018: The AAI-paradigm and Quantum Logic

PRE-VIEW: NEW EXPANDED AAI THEORY 23.January 2019: Outline of the new expanded  AAI Paradigm. Before re-writing the main text with these ideas the new advanced AAI theory will first be tested during the summer 2019 within a lecture with student teams as well as in  several workshops outside the Frankfurt University of Applied Sciences with members of different institutions.