Mirror
/
cpython
mirror of https://github.com/python/cpython
4
1
Fork 0
Code Issues Releases Wiki Activity

Merge with 3.2.

This commit is contained in:
Ezio Melotti 2011-04-21 16:13:44 +03:00
parent c6f079d1b2 0ee9c1be76
commit 5bba6c2785
1 changed files with 11 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
Doc/library/argparse.rst
View File

@ -997,7 +997,7 @@ etc. are all supported.
required
^^^^^^^^
In general, the argparse module assumes that flags like ``-f`` and ``--bar``
In general, the :mod:`argparse` module assumes that flags like ``-f`` and ``--bar``
indicate *optional* arguments, which can always be omitted at the command line.
To make an option *required*, ``True`` can be specified for the ``required=``
keyword argument to :meth:`add_argument`::
@ -1617,9 +1617,9 @@ Mutual exclusion
.. method:: add_mutually_exclusive_group(required=False)
Create a mutually exclusive group. argparse will make sure that only one of
the arguments in the mutually exclusive group was present on the command
line::
Create a mutually exclusive group. :mod:`argparse` will make sure that only
one of the arguments in the mutually exclusive group was present on the
command line::
>>> parser = argparse.ArgumentParser(prog='PROG')
>>> group = parser.add_mutually_exclusive_group()
@ -1786,14 +1786,14 @@ Exiting methods
Upgrading optparse code
-----------------------
Originally, the argparse module had attempted to maintain compatibility with
optparse. However, optparse was difficult to extend transparently, particularly
with the changes required to support the new ``nargs=`` specifiers and better
usage messages. When most everything in optparse had either been copy-pasted
over or monkey-patched, it no longer seemed practical to try to maintain the
backwards compatibility.
Originally, the mod:`argparse` module had attempted to maintain compatibility
with :mod:`optparse`. However, :mod:`optparse` was difficult to extend
transparently, particularly with the changes required to support the new
``nargs=`` specifiers and better usage messages. When most everything in
:mod:`optparse` had either been copy-pasted over or monkey-patched, it no
longer seemed practical to try to maintain the backwards compatibility.
A partial upgrade path from optparse to argparse:
A partial upgrade path from :mod:`optparse` to :mod:`argparse`:
* Replace all ``add_option()`` calls with :meth:`ArgumentParser.add_argument`
calls.