Decode from specified encoding.

    ``encoding`` defaults to the preferred encoding.
    ``errors`` defaults to the preferred error handler.

def decode(string, encoding=None, errors=None):
    """Decode from specified encoding.

    ``encoding`` defaults to the preferred encoding.
    ``errors`` defaults to the preferred error handler.
    """
    if encoding is None:
        encoding = getpreferredencoding()
    if errors is None:
        errors = getpreferrederrors()
    return string.decode(encoding, errors)