tree 1bdba8e027e0b76614990ef4baa42ab71b2c5f13
parent 50a879301ea3d27437235e0d25607eb8b1796b56
author martin f. krafft <madduck@madduck.net> 1385977615 +0100
committer martin f. krafft <madduck@madduck.net> 1385977904 +0100

Do not use instance of dict() as default for seen

Classic mistake:

  def foo(arg={}):
    …

this will instantiate a dict and use *the same instance* on subsequent
invocations, i.e. as if you used foo.arg inside the function.

Instead, instantiate the dict() in the function body!

Signed-off-by: martin f. krafft <madduck@madduck.net>