Hi,

I've just came across an insignificant bug in the Python command line 
interface. When using an unknown parameter, the same error appears 
more than once:

$ python3 -a -z
Unknown option: -a
Unknown option: -z
Unknown option: -a
usage: python3 [option] ... [-c cmd | -m mod | file | -] [arg] ...
Try `python -h' for more information.
$ python -a -z
Unknown option: -a
Unknown option: -z
Unknown option: -a
usage: python [option] ... [-c cmd | -m mod | file | -] [arg] ...
Try `python -h' for more information.

I've attached the patch for this issue, including the test.

Submitted another patchs for py3k and python 2.7

LGTM.

Hieu Nguyen, can you please submit a contributor form?

http://python.org/psf/contrib/contrib-form/
http://python.org/psf/contrib/

Serhiy, actually I have submitted my contributor form to Petri Lehtinen in  a sprint here in Finland.

New changeset d2df83d7c649 by Ezio Melotti in branch '2.7':
#16306: Fix multiple error messages when unknown command line parameters where passed to the interpreter.  Patch by Hieu Nguyen.
http://hg.python.org/cpython/rev/d2df83d7c649

New changeset 0153c077a0fd by Ezio Melotti in branch '3.2':
#16306: Fix multiple error messages when unknown command line parameters where passed to the interpreter.  Patch by Hieu Nguyen.
http://hg.python.org/cpython/rev/0153c077a0fd

New changeset 7f01121a660d by Ezio Melotti in branch '3.3':
#16306: merge with 3.2.
http://hg.python.org/cpython/rev/7f01121a660d

New changeset 3a1bcb6de167 by Ezio Melotti in branch 'default':
#16306: merge with 3.3.
http://hg.python.org/cpython/rev/3a1bcb6de167

Fixed, thanks for the patch!

You broke the Ubuntu Shared buildbot, could you fix it?
http://buildbot.python.org/all/buildslaves/bolen-ubuntu

Sorry, it's my fault. Here is a patch which should fix the bug.

Actually 2.7 tests should not be broken, but this patch unify 2.7 and 3.x code.

The new patch doesn't seem to be correct:
without the patch:
$ ./python -a -z
Unknown option: -a
Unknown option: -z
usage: ./python [option] ... [-c cmd | -m mod | file | -] [arg] ...

with the patch:
$ ./python -a -z
Unknown option: -a
usage: ./python [option] ... [-c cmd | -m mod | file | -] [arg] ...

A test case for this should also be added.

Thanks, Ezio, for point.

> without the patch:
> $ ./python -a -z
> Unknown option: -a
> Unknown option: -z
> usage: ./python [option] ... [-c cmd | -m mod | file | -] [arg] ...

This behavior isn't correct. Try also "-E -a -z" and "-a -E -z" (also with 3.3.0).

However I found an error in the test in my patch (actually previous test for 2.7 was correct, but not full). Patch updated, new tests added.

> This behavior isn't correct.

Shouldn't python report all the invalid flags passed?

Should not. It happened unintentionally (and inconsistently).

New changeset 6a79e3beb854 by Ezio Melotti in branch '2.7':
#16306: report only the first unknown option and add more tests.  Patch by Serhiy Storchaka.
http://hg.python.org/cpython/rev/6a79e3beb854

New changeset 654a628f5f00 by Ezio Melotti in branch '3.2':
#16306: report only the first unknown option and add more tests.  Patch by Serhiy Storchaka.
http://hg.python.org/cpython/rev/654a628f5f00

New changeset 421a8a5ffbb2 by Ezio Melotti in branch '3.3':
#16306: merge with 3.2.
http://hg.python.org/cpython/rev/421a8a5ffbb2

New changeset 51caa0820fad by Ezio Melotti in branch 'default':
#16306: merge with 3.3.
http://hg.python.org/cpython/rev/51caa0820fad

Buildbots are happy, closing.
Thanks Serhiy for the patches!