On Tue, 22 Jan 2013 15:07:18 +0000, Tim Golden wrote: > On 22/01/2013 14:53, Terry Reedy wrote: >> On 1/22/2013 4:24 AM, Tim Golden wrote: >>> [Python 2.7/3.3 (and hg tip) running on Windows. Not Windows-specific, >>> though]. >>> >>> I use the python -mpackage incantation to run a package which has a >>> __main__.py module and which uses relative imports internally. >>> >>> I'm developing under cherrypy which includes a reloader for >>> development. The reloader attempts to rebuild the original command >>> line by combining sys.executable and sys.argv and then does an execv. >>> >>> There does not appear to be any way within Python of determining the >>> command line I used. The combination of sys.executable and sys.argv in >>> this case will look like: "c:\python33\python.exe app/__main__.py". >>> But running this precludes the use of package-relative imports. >> >> If I understand right, the reloader should be updated to translate >> 'x/__main__.py' to '-m x'. Filenames of form'__x__' are reserved, in a >> sense, like similar identifiers in programs, and '__main__.py' should >> not be used for a file meant to executed directly. > > To be clear: it's Python itself, not the reloader, which is coming up > with __main__.py. sys.executable is "c:\python33\python.exe" and > sys.argv is ['c:\path\to\__main__.py'] for a program which has been > started by "c:\python33\python.exe -mpath\to".
I don't believe you can give direct paths to the -m flag. It uses the normal import mechanism to locate a module or package, so you have to give it a name which would be importable. c:\python33\python.exe -m app would work, where "app" is either a package or module: C:\something\on\PYTHONPATH\app\__main__.py C:\something\on\PYTHONPATH\app.py > Obviously, there is any number of ways around this specific issue, > including what you suggest: a canonical rewrite of "python > path\to\__main__.py" into "python -mpath\to". But it's not clear to me > that this rewrite should be the responsibility of calling code. I am a bit disturbed that you cannot distinguish between: python C:\something\on\pythonpath\app\__main__.py python -m app by inspecting the command line. I consider it a bug, or at least a misfeature, if Python transforms the command line before making it available in sys.argv. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
