Encode base 10 integer into other bases

base_converter.py

class BaseConverter(object):
    """
    Class for encoding/decoding base 10 values to/from another base
    """
    def __init__(self, base, base_digits):
        """
        :param base: (int) the base (e.g 2, 16, 64)
        :param base_digits: (iterator) of base digits (e.g "01" for base 2, etc)
        """
        self.base = base
        self.base_digits = base_digits

    def encode(self, value):
        """
        Take the base 10 ``value`` and encode it to base ``self.base``

        :param value: (int) base 10 integer to be encoded.
        :returns: (str) base encoded value.
        """
        if value == 0:
            return str(self.base_digits[0])
        
        converted_digits = []

        while value > 0:
            converted_digits.append(str(self.base_digits[value % self.base]))
            value /= self.base

        return "".join(reversed(converted_digits))

    def decode(self, value):
        """
        Take the base encoded ``value`` and decode it to base 10

        :param value: (str) base encoded string.
        :returns: (int) base 10 decoded integer.
        """
        base_10_value = 0

        for i, digit in enumerate(reversed(value)):
            base_10_value += self.base_digits.index(digit) * self.base**i

        return int(base_10_value)

example.py

# Base 16
>>> base_16_digits = "0123456789ABCDEF"
>>> c = BaseConverter(16, base_16_digits)
>>> c.encode(30)
'1E'
>>> c.decode('1E')
30

# Base 2 (binary)
>>> c = BaseConverter(2, "01")
>>> c.encode(11)
'1011'
>>> c.decode('1011')
11

# Base 62
>>> import string
>>> base_62_digits = "".join([str(n) for n in range(10)]) + string.letters
>>> c = BaseConverter(62, base_62_digits)
>>> c.encode(1002312)
'4cKk'
>>> c.decode('4cKk')
1002312