MattWoodhead

"""
A cx_freeze setup script that works for executables for python 3.5+ based
apps that use the tkinter graphics framework.
i.e. fixes the "KeyError: 'TCL_Library'" error
"""
import os
import sys
from cx_Freeze import setup, Executable

# set location tkinter path variables using os

MattWoodhead

"""
An examnple of the use of threading to allow simultaneous operations in a
tkinter gui (which is locked to a single thread)
"""

import threading
import tkinter as tk
from tkinter import ttk

MattWoodhead

"""
A comparison of methods for rounding upwards on dvision operations. Suprisingly, the fastest method was multiplying
the numerator in the division operation by negative one, using floor division, and then multiplying again by 
negative one to arrive at the rounded up answer

Further testing is required on larger numbers (and maybe complex numbers?) to see if the results scale well.
"""

import math
import numpy

MattWoodhead

"""
dynamically create buttons with commands in a tkinter gui using a dictionary
"""

import os
import tkinter as tk

# Dictionary of button names and filepaths
PATHS = {"A path": r"C:\Users\Matt\Google Drive\Python\Test\file_1.txt",
         "B path": r"C:\Users\Matt\Google Drive\Python\Test\file_2.txt",

MattWoodhead

import itertools

a = itertools.cycle(range(3))

letters = "ABCDEFG"

for num, alpha in zip(a, letters):
    print(f"{num} - {alpha}")  # f-strings are awesome

MattWoodhead

"""
An improvement on the tkinter Checkbar example,
available from http://www.python-course.eu/tkinter_checkboxes.php
Author: Matt Woodhead
"""

import tkinter as tk
from tkinter import ttk

MattWoodhead

import subprocess

def explorer_on_file(url):
    """ opens a windows explorer window """
    subprocess.Popen(f'explorer /select,"{url}"')

explorer_on_file(r"C:\Python\python.exe")

MattWoodhead

import socket

def ip_check():
    """ uses the cockets module to find the local IP address """
    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    s.connect(("8.8.8.8", 80))  # Ping Google DNS server
    ip_address = s.getsockname()[0]
    s.close()
    return ip_address

MattWoodhead

def caseless_dict_search(dictionary, search_string):
    """ performs a case insensitive key search on a standard dictionary """
    # A dict matching lower case and actual case representations of the Keys
    keys_dict = {k.casefold(): k for k in dictionary.keys()}
    # Using the get() function to search dict with builtin error handling
    return dictionary.get(keys_dict.get(search_string.lower(), None), None)

test_dict = {"A": 0, "B": 1, "c": 2, "d":3}
INPUT = "D"  # Note case does not match any of the keys in the above dict
result = caseless_dict_search(test_dict, INPUT)

MattWoodhead

""" Easier to ask forgiveness than permission """

my_dict = {"key_0": 0,
           "key_1": 10,
           "key_2": 20,
           "key_3": 30,
           "key_4": 40,
          }