def listen(url, prefix=None, **kwargs):
    """
    bind and return a connection instance from url

    arguments:
        - url (str): xbahn connection url
    """
    return listener(url, prefix=get_prefix(prefix), **kwargs)
def listen ( url , prefix = None , ** kwargs ) : return listener ( url , prefix = get_prefix ( prefix ) , ** kwargs )
bind and return a connection instance from url

    arguments:
        - url (str): xbahn connection url