New submission from Raymond Hettinger <raymond.hettin...@gmail.com>:
The argument to CALL_FUNCTION is overloaded to show both the number of positional arguments and keyword arguments (shifted by 8-bits): >>> dis("foo(10, opt=True)") 1 0 LOAD_NAME 0 (foo) 3 LOAD_CONST 0 (10) 6 LOAD_CONST 1 ('opt') 9 LOAD_CONST 2 (True) 12 CALL_FUNCTION 257 15 RETURN_VALUE It is not obvious that the 257 argument causes three stack arguments to be popped. The disassembly should add a parenthetical to explain the composition: >>> dis("foo(10, opt=True)") 1 0 LOAD_NAME 0 (foo) 3 LOAD_CONST 0 (10) 6 LOAD_CONST 1 ('opt') 9 LOAD_CONST 2 (True) 12 CALL_FUNCTION 257 (1 positional, 1 keyword pair) 15 RETURN_VALUE ---------- components: Library (Lib) messages: 133481 nosy: rhettinger priority: normal severity: normal status: open title: disassembly needs to argument counts on calls with keyword args type: feature request versions: Python 3.3 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue11823> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com