JS on the other side is very consistent to Perl, especially when using let

Saying Python's behavior is consistent to Perl's is at best an over simplification and can't be left uncommented.

Nope, no simplification. Capturing works exactly the same: Variables in scope remain accessible beyond their normal scope.

Your code was also over complicating Python, you never needed the variable i, because j never goes out of scope.

subrefs = []

for j in range(1,4):
   def subref():
      print( j )

   subrefs.append( subref )

for subref in subrefs:
   subref()
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Cheers Rolf
_{(addicted to the Perl Programming Language :)
see Wikisyntax for the Monastery}