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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 signature_validate(signature, error = None) :
    "is signature a valid sequence of zero or more complete types."
    error, my_error = _get_error(error)
    result = dbus.dbus_signature_validate(signature.encode(), error._dbobj) != 0
    my_error.raise_if_set()
    return \
        result