bpo-32030: Update sys.path[0] earlier for main importer by vstinner · Pull Request #4868 · python/cpython

https://bugs.python.org/issue32030

See also https://bugs.python.org/issue32324 which is related (but not directly) to modified code.

Side effect of this change: sys.path is now modified before "import readline" when main_importer_path is set.

Side effect of this change: sys.path is now modified before "import readline" when main_importer_path is set.

Note: in such case, readline is only imported if the -i option is used.

I'm not sure that this change is correct. I don't understand well of sys.path is used to run the "main" module. Again, see https://bugs.python.org/issue32324