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- # encoding=utf-8
- '''Shortcode arbitrary integer base alphabet conversion'''
- # http://stackoverflow.com/a/1119769/1524507
- def int_to_str(num, alphabet):
- '''Convert integer to string.'''
- if (num == 0):
- return alphabet[0]
- arr = []
- base = len(alphabet)
- while num:
- rem = num % base
- num = num // base
- arr.append(alphabet[rem])
- arr.reverse()
- return ''.join(arr)
- def str_to_int(string, alphabet):
- '''Convert string to integer.'''
- base = len(alphabet)
- strlen = len(string)
- num = 0
- idx = 0
- for char in string:
- power = (strlen - (idx + 1))
- num += alphabet.rindex(char) * (base ** power)
- idx += 1
- return num
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