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25 lines
975 B
Python
25 lines
975 B
Python
from string import ascii_lowercase as abc
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from random import shuffle
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class Cipher(object):
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def __init__(self, key=None):
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if key:
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self.key = ''.join(dict.fromkeys(self.key)) # Key with repeated characters is completely useless
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elif not key:
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self.key = list(abc)
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shuffle(self.key)
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self.key = ''.join(self.key)
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key_values = [self.keyvalue(i) for i in range(len(self.key))]
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self.key_alphabets = [(abc[index:] + abc[: index]) for index in key_values]
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def encode(self, text):
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return ''.join(self.key_alphabets[index][abc.find(char)]
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for index, char in enumerate(text.lower()))
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def decode(self, text):
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return ''.join(abc[self.key_alphabets[index].find(char)]
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for index, char in enumerate(text.lower()))
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# Gets the shifting value of the key at the index specified
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def keyvalue(self, index):
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return abc.find(self.key[index % len(self.key)]) |