code: def find(self, name):
          
          for i, chan in enumerate(self):
              if name == chan.name:
                  return i
          raise ValueError(name)
docs: Find the `Channel` with a specific name in this `ChannelList`.
  
          Parameters
          ----------
          name : `str`
              name of the `Channel` to find
  
          Returns
          -------
          index : `int`
              the position of the first `Channel` in this `ChannelList`
              whose `~Channel.name` matches the search key.
  
          Raises
          ------
          ValueError
              if no matching `Channel` is found.