This commit is contained in:
Antoine Pitrou 2012-02-20 01:52:17 +01:00
commit 4a57846efe
1 changed files with 16 additions and 15 deletions

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@ -739,7 +739,7 @@ how the command-line arguments should be handled. The supported actions are:
* ``'version'`` - This expects a ``version=`` keyword argument in the
:meth:`~ArgumentParser.add_argument` call, and prints version information
and exits when invoked.
and exits when invoked::
>>> import argparse
>>> parser = argparse.ArgumentParser(prog='PROG')
@ -791,8 +791,8 @@ single action to be taken. The ``nargs`` keyword argument associates a
different number of command-line arguments with a single action. The supported
values are:
* ``N`` (an integer). ``N`` arguments from the command line will be gathered together into a
list. For example::
* ``N`` (an integer). ``N`` arguments from the command line will be gathered
together into a list. For example::
>>> parser = argparse.ArgumentParser()
>>> parser.add_argument('--foo', nargs=2)
@ -861,7 +861,7 @@ values are:
* ``argparse.REMAINDER``. All the remaining command-line arguments are gathered
into a list. This is commonly useful for command line utilities that dispatch
to other command line utilities.
to other command line utilities::
>>> parser = argparse.ArgumentParser(prog='PROG')
>>> parser.add_argument('--foo')
@ -884,7 +884,8 @@ the various :class:`ArgumentParser` actions. The two most common uses of it are
* When :meth:`~ArgumentParser.add_argument` is called with
``action='store_const'`` or ``action='append_const'``. These actions add the
``const`` value to one of the attributes of the object returned by :meth:`~ArgumentParser.parse_args`. See the action_ description for examples.
``const`` value to one of the attributes of the object returned by
:meth:`~ArgumentParser.parse_args`. See the action_ description for examples.
* When :meth:`~ArgumentParser.add_argument` is called with option strings
(like ``-f`` or ``--foo``) and ``nargs='?'``. This creates an optional
@ -1595,21 +1596,21 @@ FileType objects
The :class:`FileType` factory creates objects that can be passed to the type
argument of :meth:`ArgumentParser.add_argument`. Arguments that have
:class:`FileType` objects as their type will open command-line arguments as files
with the requested modes and buffer sizes:
with the requested modes and buffer sizes::
>>> parser = argparse.ArgumentParser()
>>> parser.add_argument('--output', type=argparse.FileType('wb', 0))
>>> parser.parse_args(['--output', 'out'])
Namespace(output=<_io.BufferedWriter name='out'>)
>>> parser = argparse.ArgumentParser()
>>> parser.add_argument('--output', type=argparse.FileType('wb', 0))
>>> parser.parse_args(['--output', 'out'])
Namespace(output=<_io.BufferedWriter name='out'>)
FileType objects understand the pseudo-argument ``'-'`` and automatically
convert this into ``sys.stdin`` for readable :class:`FileType` objects and
``sys.stdout`` for writable :class:`FileType` objects:
``sys.stdout`` for writable :class:`FileType` objects::
>>> parser = argparse.ArgumentParser()
>>> parser.add_argument('infile', type=argparse.FileType('r'))
>>> parser.parse_args(['-'])
Namespace(infile=<_io.TextIOWrapper name='<stdin>' encoding='UTF-8'>)
>>> parser = argparse.ArgumentParser()
>>> parser.add_argument('infile', type=argparse.FileType('r'))
>>> parser.parse_args(['-'])
Namespace(infile=<_io.TextIOWrapper name='<stdin>' encoding='UTF-8'>)
Argument groups