> All variables are rather some equivalent of package variables, where each function counts as a package that can't access variables of other function.

That's more or less how lexicals are realized in Perl.

A Pad° is a hash like structure ("namespace") like a package. (with the difference that it doesn't have globs)

Every scope has it's own pad, nesting scopes results in a chain of pads to be investigated.

You may want to play a bit with PadWalker

> Python doesn't have lexicals.

Python has closures, closures require lexicals.

> there is no equivalent to my in python.

Implementation of semantic matters not syntax or naming.

update

the first assignment in a "scope" is an implicit declaration in Python.

Sometimes it's a my sometimes an our .

The mess starts because you can't use something like strict* to catch typos and Py3 needed to introduce nonlocal to mark assignments which are not declarations.

"Explicit is better than implicit" ... LOL

Cheers Rolf
(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery FootballPerl is like chess, only without the dice

°) Pad: = short for perlguts#Scratchpads

*) which JS successfully copied because it has var and even let now.

In reply to Re^3: Nesting Functions by LanX
in thread Nesting Functions by betmatt

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