Serhiy Storchaka added the comment: Currently it is not possible to declare a Python function with more than 255 parameters. There were two historical causes of this:
1. Opcodes MAKE_FUNCTION and MAKE_CLOSURE packed the number of default values for positional and keyword parameters in the opcode argument as 8-bit numbers. 2. co_cell2arg was of type "unsigned char *". It's mapped a cell index to an argument index and didn't support arguments with index > 254. The first limitation is disappeared in 3.6 after changing the format of MAKE_FUNCTION (issue27095). Proposed patch gets rid of the second cause by changing the type of co_cell2arg and removes explicit check in the compiler. ---------- components: +Interpreter Core keywords: +patch nosy: +serhiy.storchaka stage: -> patch review versions: +Python 3.7 -Python 3.4 Added file: http://bugs.python.org/file45667/no-params-limit.patch _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue18896> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
