palindrome.py

def palindrome_test2(candidate):
    if not isinstance(basestring, candidate):
        raise TypeError("The argument to this function must be a string.")

    alphanum_chars = [l for l in candidate if l != " "]

    for idx, i in enumerate(alphanum_chars, 1):
        if i == alphanum_chars[-idx]:
            continue
        else:
            return False
    return True