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#10871: "file" does not exist anymore in Python 3. Also adapt the reprs of opened file objects.

This commit is contained in:
Georg Brandl 2011-01-09 09:31:01 +00:00
parent c9007081ef
commit 04536b0edf
1 changed files with 14 additions and 14 deletions
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28
Doc/library/argparse.rst
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@ -781,11 +781,11 @@ values are:
>>> parser.add_argument('outfile', nargs='?', type=argparse.FileType('w'),
... default=sys.stdout)
>>> parser.parse_args(['input.txt', 'output.txt'])
Namespace(infile=<open file 'input.txt', mode 'r' at 0x...>,
outfile=<open file 'output.txt', mode 'w' at 0x...>)
Namespace(infile=<_io.TextIOWrapper name='input.txt' encoding='UTF-8'>,
outfile=<_io.TextIOWrapper name='output.txt' encoding='UTF-8'>)
>>> parser.parse_args([])
Namespace(infile=<open file '<stdin>', mode 'r' at 0x...>,
outfile=<open file '<stdout>', mode 'w' at 0x...>)
Namespace(infile=<_io.TextIOWrapper name='<stdin>' encoding='UTF-8'>,
outfile=<_io.TextIOWrapper name='<stdout>' encoding='UTF-8'>)
* ``'*'``. All command-line args present are gathered into a list. Note that
it generally doesn't make much sense to have more than one positional argument
@ -881,26 +881,26 @@ type
By default, ArgumentParser objects read command-line args in as simple strings.
However, quite often the command-line string should instead be interpreted as
another type, like a :class:`float`, :class:`int` or :class:`file`. The
``type`` keyword argument of :meth:`add_argument` allows any necessary
type-checking and type-conversions to be performed. Many common built-in types
can be used directly as the value of the ``type`` argument::
another type, like a :class:`float` or :class:`int`. The ``type`` keyword
argument of :meth:`add_argument` allows any necessary type-checking and
type-conversions to be performed. Common built-in types and functions can be
used directly as the value of the ``type`` argument::
>>> parser = argparse.ArgumentParser()
>>> parser.add_argument('foo', type=int)
>>> parser.add_argument('bar', type=file)
>>> parser.add_argument('bar', type=open)
>>> parser.parse_args('2 temp.txt'.split())
Namespace(bar=<open file 'temp.txt', mode 'r' at 0x...>, foo=2)
Namespace(bar=<_io.TextIOWrapper name='temp.txt' encoding='UTF-8'>, foo=2)
To ease the use of various types of files, the argparse module provides the
factory FileType which takes the ``mode=`` and ``bufsize=`` arguments of the
``file`` object. For example, ``FileType('w')`` can be used to create a
:func:`open` function. For example, ``FileType('w')`` can be used to create a
writable file::
>>> parser = argparse.ArgumentParser()
>>> parser.add_argument('bar', type=argparse.FileType('w'))
>>> parser.parse_args(['out.txt'])
Namespace(bar=<open file 'out.txt', mode 'w' at 0x...>)
Namespace(bar=<_io.TextIOWrapper name='out.txt' encoding='UTF-8'>)
``type=`` can take any callable that takes a single string argument and returns
the type-converted value::
@ -1512,7 +1512,7 @@ FileType objects
>>> parser = argparse.ArgumentParser()
>>> parser.add_argument('--output', type=argparse.FileType('wb', 0))
>>> parser.parse_args(['--output', 'out'])
Namespace(output=<open file 'out', mode 'wb' at 0x...>)
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
@ -1521,7 +1521,7 @@ FileType objects
>>> parser = argparse.ArgumentParser()
>>> parser.add_argument('infile', type=argparse.FileType('r'))
>>> parser.parse_args(['-'])
Namespace(infile=<open file '<stdin>', mode 'r' at 0x...>)
Namespace(infile=<_io.TextIOWrapper name='<stdin>' encoding='UTF-8'>)
Argument groups