base_32_text.py

def encode(s):
    """
    Encode text containing lowercase letters and spaces as a base32 integer.
    """

    return sum([
        (ord('{' if c == ' ' else c) - ord('a') + 1) << 5 * i
        for i, c in enumerate(s)
    ])

def decode(n):
    """
    Decode text represented as an integer with encode() 
    """

    return ''.join(
        chr(((n >> 5 * i) & 31) + ord('a') - 1)
        for i in it.takewhile(lambda i: n >> 5 * i, count(0))
    ).replace('{', ' ')