As an inside view from the committee I would say it is really more that python was faster in getting all the good stuff.
Other languages usage of a certain feature is seldom viewed as more than a hint that a feature might be a good idea, most features are motivated by solving problems that were Identified. Individual feature authors and reviewers might however be influenced by other languages they know/like.
As far as language influence goes I would say that Haskell () is the strongest one, it keeps popping up as a reference during design discussions.
Python seems to be regarded as being good enough so that saying: "We should do x because Python does so" will not get you thrown from the room, unlike other languages I won't mention.