code: def from_url(cls, url, db=None, **kwargs):
          
          connection_pool = ConnectionPool.from_url(url, db=db, **kwargs)
          return cls(connection_pool=connection_pool)
docs: Return a Redis client object configured from the given URL
  
          For example::
  
              redis://[:password]@localhost:6379/0
              rediss://[:password]@localhost:6379/0
              unix://[:password]@/path/to/socket.sock?db=0
  
          Three URL schemes are supported:
  
          - ```redis://``
            <http://www.iana.org/assignments/uri-schemes/prov/redis>`_ creates a
            normal TCP socket connection
          - ```rediss://``
            <http://www.iana.org/assignments/uri-schemes/prov/rediss>`_ creates a
            SSL wrapped TCP socket connection
          - ``unix://`` creates a Unix Domain Socket connection
  
          There are several ways to specify a database number. The parse function
          will return the first specified option:
              1. A ``db`` querystring option, e.g. redis://localhost?db=0
              2. If using the redis:// scheme, the path argument of the url, e.g.
                 redis://localhost/0
              3. The ``db`` argument to this function.
  
          If none of these options are specified, db=0 is used.
  
          Any additional querystring arguments and keyword arguments will be
          passed along to the ConnectionPool class's initializer. In the case
          of conflicting arguments, querystring arguments always win.