New submission from Paul Sokolovsky <pfal...@users.sourceforge.net>:
CPython's Data Model -> Internal types -> Code objects, direct link as of version 3.7 is: https://docs.python.org/3.7/reference/datamodel.html?highlight=co_stacksize#index-55 , states following: * "co_nlocals is the number of local variables used by the function (including arguments);" * "co_stacksize is the required stack size (including local variables);" However, practical checking shows that co_stacksize is the required stack size WITHOUT local variables. One could argue about the meaning of "local variables" in the description of co_stacksize above, saying that what is meant is temporary stack variables of something. That's why I quoted above co_nlocals description too, it clearly shows that local variebles are local function variables (include functions args), and nothing else. Code to reproduce: ====== def func(): a = 1 b = 2 c = 3 print("co_stacksize", func.__code__.co_stacksize) print("co_nlocals", func.__code__.co_nlocals) ====== Result of running: ====== $ python3.7 script_under_test.py co_stacksize 1 co_nlocals 3 ====== Clearly, co_stacksize doesn't include the size of local vars, or it would have been larger than co_nlocals in printout. ---------- assignee: docs@python components: Documentation messages: 353508 nosy: docs@python, pfalcon priority: normal severity: normal status: open title: docs: Code object's "co_stacksize" field is described with mistake versions: Python 3.5, Python 3.6, Python 3.7, Python 3.8, Python 3.9 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue38316> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
