Imk0tter

def base(number,baseFrom,baseTo):
    if baseFrom == 10: return __base(long(number),baseTo)
    return __base(_base(str(number).lower(),baseFrom,len(str(number))),baseTo)

def _base(num,b1,len,mod=0):
    charset = string.digits + string.ascii_lowercase
    out = charset.index(num[len-1])*b1**mod
    return out if len == 1 else out + _base(num,b1,len-1,mod+1)

def __base(num,b2):
    charset = string.digits + string.ascii_uppercase
    y = num%b2
    out = charset[y]
    return out if num == y else __base((num-y)/b2,b2) + out