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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def integer(token):
 """ Convert numeric strings into integers. @type token: str @param token: String to parse. @rtype: int @return: Parsed integer value. """

        token = token.strip()
        neg = False
        if token.startswith(compat.b('-')):
            token = token[1:]
            neg = True
        if token.startswith(compat.b('0x')):
            result = int(token, 16)     # hexadecimal
        elif token.startswith(compat.b('0b')):
            result = int(token[2:], 2)  # binary
        elif token.startswith(compat.b('0o')):
            result = int(token, 8)      # octal
        else:
            try:
                result = int(token)     # decimal
            except ValueError:
                result = int(token, 16) # hexadecimal (no "0x" prefix)
        if neg:
            result = -result
        return result