Don't use a list comprehension when we don't need the resulting list.

Author: alex

django/dispatch/dispatcher.py

@@ -270,7 +270,8 @@ def signals_receiver(sender, **kwargs):
  """
  def _decorator(func):
  if isinstance(signal, (list, tuple)):
- [s.connect(func, **kwargs) for s in signal]
+ for s in signal:
+ s.connect(func, **kwargs)
  else:
  signal.connect(func, **kwargs)
  return func