human
Solve the following python programming problem given the following code:
@public
def subscribe(uri, options=None):
assistant
#Here is the Python program you requested.

    """Decorator for WAMP event handlers.
    :param uri:
    :type uri: str
    :param options:
    :type options: None or SubscribeOptions
    """
    def decorate(f):
        assert callable(f)
        if (not hasattr(f, '_wampuris')):
            f._wampuris = []
        f._wampuris.append(Pattern(uri, Pattern.URI_TARGET_HANDLER, options))
        return f
    return decorate