Prepared for packaging

This commit is contained in:
2019-07-15 23:14:42 +02:00
parent 3d3f6a44ac
commit 710e0b2069
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'''
calc_entro.py calculates the entropy of a given string or file
This uses the negative sum of the log (to the base of 2) of the probability
times the probability of a char to occur in a certain string as the entropy.
'''
import math
import argparse
# Calculates the entropy of a given string (as described in the docstring)
def calculateEntropy(input_string):
alphabet, alphabet_size, entropy = {}, 0, 0
for char in input_string:
if char in alphabet:
alphabet[char] += 1
else:
alphabet[char] = 1
alphabet_size += 1
for char in alphabet:
alphabet[char] = alphabet[char] / alphabet_size
entropy -= alphabet[char] * math.log(alphabet[char], 2)
return entropy, alphabet
# Outputs a given entropy including the original text and the alphabet with probabilities
def printEntropy(original_string, entropy_value, alphabet_dict, simple_bool):
print('---')
if simple_bool == False:
print('Content: ' + original_string)
print('Probabilities: ' + str(alphabet_dict))
print('Entropy: ' + str(entropy_value) + ' bits')
print('---')
# Reads a file by a given path
def readEntropyFile(path_string):
f = open(path_string, 'r')
content = f.read().replace('\n', ' ')
f.close()
return content.strip()
# List of the arguments one can use to influence the behavior of the program
parser = argparse.ArgumentParser(description='Calculate the information entropy of some strings.')
# INPUT ARGUMENTS
parser.add_argument('strings', nargs='*', default='', type=str, help='Strings to calculate the entropy of.')
parser.add_argument('--files', nargs='*', type=str, default='', help='Provide file path(s) to calculate the entropy of.')
# OUTPUT OPTIONS
parser.add_argument('--simple', nargs='?', type=bool, default=False, help='Determines the explicitness of the output. (True = only entropy shown)')
# CONVERT OPTIONS
parser.add_argument('--lower', nargs='?', type=bool, default=False, help='Converts given strings or textfiles to lowercase before calculating.')
parser.add_argument('--upper', nargs='?', type=bool, default=False, help='Converts given strings or textfiles to uppercase before calculating.')
parser.add_argument('--squash', nargs='?', type=bool, default=False, help='Removes all whitespaces before calculating.')
args = parser.parse_args()
# Prepares the queue of different strings
queue = []
# Add all the provided strings to the list
for string in args.strings:
queue.append(string)
# Add all the provided files to the list
for file in args.files:
string = readEntropyFile(file)
queue.append(string)
# Interates over the collected strings and prints the entropies
for string in queue:
if args.lower != False:
string = string.lower()
elif args.upper != False:
string = string.upper()
if args.squash != False:
string = string.replace(" ", "")
a, b = calculateEntropy(string)
printEntropy(string, a, b, args.simple)

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entro.py/__init__.py Normal file
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name = "entro.py"

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entro.py/entro.py Normal file
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import math
# Calculates the entropy of a given string
# Returns the entropy and an alphabet with the calculated probabilities
def calculateEntropy(input_string):
alphabet, alphabet_size, entropy = {}, 0, 0
for char in input_string:
if char in alphabet:
alphabet[char] += 1
else:
alphabet[char] = 1
alphabet_size += 1
for char in alphabet:
alphabet[char] = alphabet[char] / alphabet_size
entropy -= alphabet[char] * math.log(alphabet[char], 2)
return entropy, alphabet
# Calculates the entropy of a given string
# Returns only the entropy in bits as this is the minimal function
def calculateEntropyMin(input_string):
alphabet, alphabet_size, entropy = {}, 0, 0
for char in input_string:
if char in alphabet:
alphabet[char] += 1
else:
alphabet[char] = 1
alphabet_size += 1
for char in alphabet:
i = alphabet[char] / alphabet_size
entropy -= i * math.log(i, 2)
return entropy

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setup.py Normal file
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import setuptools
with open("README.md", "r") as fh:
long_description = fh.read()
setuptools.setup(
name="entro.py-creyD",
version="1.0",
author="Conrad Großer",
author_email="grosserconrad@gmail.com",
description="Small Information Entropy Calculator",
long_description=long_description,
long_description_content_type="text/markdown",
url="https://github.com/creyD/entro.py",
packages=setuptools.find_packages(),
classifiers=[
"Programming Language :: Python :: 3",
"License :: OSI Approved :: MIT License",
"Operating System :: OS Independent",
],
)