[issue9399] Provide a 'print' action for argparse

[Dennis Malcorps]

Dennis Malcorps <dennis.malcorps at googlemail.com> added the comment:

I totally forgot about this patch, sorry... Due to university and another python project I am working on I didn't find the time to look at the test suite. I would really appreciate it if someone else could do this ;-)

Anyway, I added the changes proposed by Steven Bethard and Éric Araujo regarding the default argument values. (patch made against trunk)

@Éric:
Well, first there is currently only the 'version' action which does this and imho it just looks strange if you try to print something else than a version info with it.
Second, there are cases where you want whitespaces to be preserved, like printing out the license of your program (as I mentioned in my first post) Just look at this BSD license:

Copyright (c) 2010, Dennis Malcorps <dennis.malcorps at gmail.com> Redistribution
and use in source and binary forms, with or without modification, are
permitted provided that the following conditions are met: 1. Redistributions
of source code must retain the above copyright notice, this list of conditions                                                                       
and the following disclaimer. 2. Redistributions in binary form must reproduce                                                                       
the above copyright notice, this list of conditions and the following                                                                                
disclaimer in the documentation and/or other materials provided with the                                                                             
distribution. 3. The name of the author may not be used to endorse or promote                                                                        
products derived from this software without specific prior written permission.                                                                       
THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED                                                                           
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF                                                                                 
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO                                                                           
EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.


This is just plain ugly.

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Added file: http://bugs.python.org/file20140/argparse.diff

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