import module in closure does not register module as a local variable def (with closures enabled).

[NiklasRosenstein]

Example:

foo = {
  import pdb
  pdb.set_trace()
}

Transpiles to

@__closure__.child
def _closure_1(__closure__, self, *arguments, **kwarguments):
    import pdb
    __closure__['pdb'].set_trace()  #< This should be just `pdb`
__closure__['foo'](_closure_1)

[NiklasRosenstein]

This was implemented in few patches ago.