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2092 lines (1753 loc) · 68.5 KB
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# SOME DESCRIPTIVE TITLE.
# Copyright (C) 2001-2022, Python Software Foundation
# This file is distributed under the same license as the Python package.
#
# Translators:
msgid ""
msgstr ""
"Project-Id-Version: Python 3.12\n"
"Report-Msgid-Bugs-To: \n"
"POT-Creation-Date: 2023-07-17 17:39+0800\n"
"PO-Revision-Date: 2018-05-23 14:38+0000\n"
"Last-Translator: Adrian Liaw <[email protected]>\n"
"Language-Team: Chinese - TAIWAN (https://github.com/python/python-docs-zh-"
"tw)\n"
"Language: zh_TW\n"
"MIME-Version: 1.0\n"
"Content-Type: text/plain; charset=UTF-8\n"
"Content-Transfer-Encoding: 8bit\n"
"Plural-Forms: nplurals=1; plural=0;\n"
#: ../../library/argparse.rst:2
msgid ""
":mod:`argparse` --- Parser for command-line options, arguments and sub-"
"commands"
msgstr ""
#: ../../library/argparse.rst:12
msgid "**Source code:** :source:`Lib/argparse.py`"
msgstr "**原始碼：**\\ :source:`Lib/argparse.py`"
#: ../../library/argparse.rst:-1
msgid "Tutorial"
msgstr "教學"
#: ../../library/argparse.rst:18
msgid ""
"This page contains the API reference information. For a more gentle "
"introduction to Python command-line parsing, have a look at the :ref:"
"`argparse tutorial <argparse-tutorial>`."
msgstr ""
#: ../../library/argparse.rst:22
msgid ""
"The :mod:`argparse` module makes it easy to write user-friendly command-line "
"interfaces. The program defines what arguments it requires, and :mod:"
"`argparse` will figure out how to parse those out of :data:`sys.argv`. The :"
"mod:`argparse` module also automatically generates help and usage messages. "
"The module will also issue errors when users give the program invalid "
"arguments."
msgstr ""
#: ../../library/argparse.rst:30
msgid "Core Functionality"
msgstr ""
#: ../../library/argparse.rst:32
msgid ""
"The :mod:`argparse` module's support for command-line interfaces is built "
"around an instance of :class:`argparse.ArgumentParser`. It is a container "
"for argument specifications and has options that apply to the parser as "
"whole::"
msgstr ""
#: ../../library/argparse.rst:41
msgid ""
"The :meth:`ArgumentParser.add_argument` method attaches individual argument "
"specifications to the parser. It supports positional arguments, options "
"that accept values, and on/off flags::"
msgstr ""
#: ../../library/argparse.rst:50
msgid ""
"The :meth:`ArgumentParser.parse_args` method runs the parser and places the "
"extracted data in a :class:`argparse.Namespace` object::"
msgstr ""
#: ../../library/argparse.rst:58
msgid "Quick Links for add_argument()"
msgstr ""
#: ../../library/argparse.rst:61
msgid "Name"
msgstr "名稱"
#: ../../library/argparse.rst:61
msgid "Description"
msgstr "描述"
#: ../../library/argparse.rst:61
msgid "Values"
msgstr "數值"
#: ../../library/argparse.rst:63
msgid "action_"
msgstr "action_"
#: ../../library/argparse.rst:63
msgid "Specify how an argument should be handled"
msgstr ""
#: ../../library/argparse.rst:63
msgid ""
"``'store'``, ``'store_const'``, ``'store_true'``, ``'append'``, "
"``'append_const'``, ``'count'``, ``'help'``, ``'version'``"
msgstr ""
"``'store'``, ``'store_const'``, ``'store_true'``, ``'append'``, "
"``'append_const'``, ``'count'``, ``'help'``, ``'version'``"
#: ../../library/argparse.rst:64
msgid "choices_"
msgstr "choices_"
#: ../../library/argparse.rst:64
msgid "Limit values to a specific set of choices"
msgstr ""
#: ../../library/argparse.rst:64
msgid ""
"``['foo', 'bar']``, ``range(1, 10)``, or :class:`~collections.abc.Container` "
"instance"
msgstr ""
#: ../../library/argparse.rst:65
msgid "const_"
msgstr "const_"
#: ../../library/argparse.rst:65
msgid "Store a constant value"
msgstr ""
#: ../../library/argparse.rst:66
msgid "default_"
msgstr "default_"
#: ../../library/argparse.rst:66
msgid "Default value used when an argument is not provided"
msgstr ""
#: ../../library/argparse.rst:66
msgid "Defaults to ``None``"
msgstr ""
#: ../../library/argparse.rst:67
msgid "dest_"
msgstr "dest_"
#: ../../library/argparse.rst:67
msgid "Specify the attribute name used in the result namespace"
msgstr ""
#: ../../library/argparse.rst:68
msgid "help_"
msgstr "help_"
#: ../../library/argparse.rst:68
msgid "Help message for an argument"
msgstr ""
#: ../../library/argparse.rst:69
msgid "metavar_"
msgstr "metavar_"
#: ../../library/argparse.rst:69
msgid "Alternate display name for the argument as shown in help"
msgstr ""
#: ../../library/argparse.rst:70
msgid "nargs_"
msgstr "nargs_"
#: ../../library/argparse.rst:70
msgid "Number of times the argument can be used"
msgstr ""
#: ../../library/argparse.rst:70
msgid ":class:`int`, ``'?'``, ``'*'``, or ``'+'``"
msgstr ":class:`int`, ``'?'``, ``'*'``, or ``'+'``"
#: ../../library/argparse.rst:71
msgid "required_"
msgstr "required_"
#: ../../library/argparse.rst:71
msgid "Indicate whether an argument is required or optional"
msgstr ""
#: ../../library/argparse.rst:71
msgid "``True`` or ``False``"
msgstr "``True`` 或 ``False``"
#: ../../library/argparse.rst:72
msgid ":ref:`type <argparse-type>`"
msgstr ""
#: ../../library/argparse.rst:72
msgid "Automatically convert an argument to the given type"
msgstr ""
#: ../../library/argparse.rst:72
msgid ""
":class:`int`, :class:`float`, ``argparse.FileType('w')``, or callable "
"function"
msgstr ""
":class:`int`、:class:`float`、``argparse.FileType('w')`` 或可呼叫的函式"
#: ../../library/argparse.rst:77
msgid "Example"
msgstr "範例"
#: ../../library/argparse.rst:79
msgid ""
"The following code is a Python program that takes a list of integers and "
"produces either the sum or the max::"
msgstr ""
#: ../../library/argparse.rst:94
msgid ""
"Assuming the above Python code is saved into a file called ``prog.py``, it "
"can be run at the command line and it provides useful help messages:"
msgstr ""
#: ../../library/argparse.rst:111
msgid ""
"When run with the appropriate arguments, it prints either the sum or the max "
"of the command-line integers:"
msgstr ""
#: ../../library/argparse.rst:122
msgid "If invalid arguments are passed in, an error will be displayed:"
msgstr ""
#: ../../library/argparse.rst:130
msgid "The following sections walk you through this example."
msgstr ""
#: ../../library/argparse.rst:134
msgid "Creating a parser"
msgstr "建立一個剖析器"
#: ../../library/argparse.rst:136
msgid ""
"The first step in using the :mod:`argparse` is creating an :class:"
"`ArgumentParser` object::"
msgstr ""
#: ../../library/argparse.rst:141
msgid ""
"The :class:`ArgumentParser` object will hold all the information necessary "
"to parse the command line into Python data types."
msgstr ""
#: ../../library/argparse.rst:146
msgid "Adding arguments"
msgstr "增加引數"
#: ../../library/argparse.rst:148
msgid ""
"Filling an :class:`ArgumentParser` with information about program arguments "
"is done by making calls to the :meth:`~ArgumentParser.add_argument` method. "
"Generally, these calls tell the :class:`ArgumentParser` how to take the "
"strings on the command line and turn them into objects. This information is "
"stored and used when :meth:`~ArgumentParser.parse_args` is called. For "
"example::"
msgstr ""
#: ../../library/argparse.rst:160
msgid ""
"Later, calling :meth:`~ArgumentParser.parse_args` will return an object with "
"two attributes, ``integers`` and ``accumulate``. The ``integers`` attribute "
"will be a list of one or more integers, and the ``accumulate`` attribute "
"will be either the :func:`sum` function, if ``--sum`` was specified at the "
"command line, or the :func:`max` function if it was not."
msgstr ""
#: ../../library/argparse.rst:168
msgid "Parsing arguments"
msgstr "剖析引數"
#: ../../library/argparse.rst:170
msgid ""
":class:`ArgumentParser` parses arguments through the :meth:`~ArgumentParser."
"parse_args` method. This will inspect the command line, convert each "
"argument to the appropriate type and then invoke the appropriate action. In "
"most cases, this means a simple :class:`Namespace` object will be built up "
"from attributes parsed out of the command line::"
msgstr ""
#: ../../library/argparse.rst:179
msgid ""
"In a script, :meth:`~ArgumentParser.parse_args` will typically be called "
"with no arguments, and the :class:`ArgumentParser` will automatically "
"determine the command-line arguments from :data:`sys.argv`."
msgstr ""
#: ../../library/argparse.rst:185
msgid "ArgumentParser objects"
msgstr "ArgumentParser 物件"
#: ../../library/argparse.rst:194
msgid ""
"Create a new :class:`ArgumentParser` object. All parameters should be passed "
"as keyword arguments. Each parameter has its own more detailed description "
"below, but in short they are:"
msgstr ""
#: ../../library/argparse.rst:198
msgid ""
"prog_ - The name of the program (default: ``os.path.basename(sys.argv[0])``)"
msgstr ""
#: ../../library/argparse.rst:201
msgid ""
"usage_ - The string describing the program usage (default: generated from "
"arguments added to parser)"
msgstr ""
#: ../../library/argparse.rst:204
msgid ""
"description_ - Text to display before the argument help (by default, no text)"
msgstr ""
#: ../../library/argparse.rst:207
msgid "epilog_ - Text to display after the argument help (by default, no text)"
msgstr ""
#: ../../library/argparse.rst:209
msgid ""
"parents_ - A list of :class:`ArgumentParser` objects whose arguments should "
"also be included"
msgstr ""
#: ../../library/argparse.rst:212
msgid "formatter_class_ - A class for customizing the help output"
msgstr ""
#: ../../library/argparse.rst:214
msgid ""
"prefix_chars_ - The set of characters that prefix optional arguments "
"(default: '-')"
msgstr ""
#: ../../library/argparse.rst:217
msgid ""
"fromfile_prefix_chars_ - The set of characters that prefix files from which "
"additional arguments should be read (default: ``None``)"
msgstr ""
#: ../../library/argparse.rst:220
msgid ""
"argument_default_ - The global default value for arguments (default: "
"``None``)"
msgstr ""
#: ../../library/argparse.rst:223
msgid ""
"conflict_handler_ - The strategy for resolving conflicting optionals "
"(usually unnecessary)"
msgstr ""
#: ../../library/argparse.rst:226
msgid ""
"add_help_ - Add a ``-h/--help`` option to the parser (default: ``True``)"
msgstr ""
#: ../../library/argparse.rst:228
msgid ""
"allow_abbrev_ - Allows long options to be abbreviated if the abbreviation is "
"unambiguous. (default: ``True``)"
msgstr ""
#: ../../library/argparse.rst:231
msgid ""
"exit_on_error_ - Determines whether or not ArgumentParser exits with error "
"info when an error occurs. (default: ``True``)"
msgstr ""
#: ../../library/argparse.rst:234
msgid "*allow_abbrev* parameter was added."
msgstr "新增 *allow_abbrev* 參數。"
#: ../../library/argparse.rst:237
msgid ""
"In previous versions, *allow_abbrev* also disabled grouping of short flags "
"such as ``-vv`` to mean ``-v -v``."
msgstr ""
#: ../../library/argparse.rst:241
msgid "*exit_on_error* parameter was added."
msgstr "新增 *exit_on_error* 參數。"
#: ../../library/argparse.rst:244 ../../library/argparse.rst:780
msgid "The following sections describe how each of these are used."
msgstr ""
#: ../../library/argparse.rst:250
msgid "prog"
msgstr ""
#: ../../library/argparse.rst:252
msgid ""
"By default, :class:`ArgumentParser` objects use ``sys.argv[0]`` to determine "
"how to display the name of the program in help messages. This default is "
"almost always desirable because it will make the help messages match how the "
"program was invoked on the command line. For example, consider a file named "
"``myprogram.py`` with the following code::"
msgstr ""
#: ../../library/argparse.rst:263
msgid ""
"The help for this program will display ``myprogram.py`` as the program name "
"(regardless of where the program was invoked from):"
msgstr ""
#: ../../library/argparse.rst:282
msgid ""
"To change this default behavior, another value can be supplied using the "
"``prog=`` argument to :class:`ArgumentParser`::"
msgstr ""
#: ../../library/argparse.rst:292
msgid ""
"Note that the program name, whether determined from ``sys.argv[0]`` or from "
"the ``prog=`` argument, is available to help messages using the ``%(prog)s`` "
"format specifier."
msgstr ""
#: ../../library/argparse.rst:309
msgid "usage"
msgstr ""
#: ../../library/argparse.rst:311
msgid ""
"By default, :class:`ArgumentParser` calculates the usage message from the "
"arguments it contains::"
msgstr ""
#: ../../library/argparse.rst:327
msgid ""
"The default message can be overridden with the ``usage=`` keyword argument::"
msgstr ""
#: ../../library/argparse.rst:342
msgid ""
"The ``%(prog)s`` format specifier is available to fill in the program name "
"in your usage messages."
msgstr ""
#: ../../library/argparse.rst:349
msgid "description"
msgstr "描述"
#: ../../library/argparse.rst:351
msgid ""
"Most calls to the :class:`ArgumentParser` constructor will use the "
"``description=`` keyword argument. This argument gives a brief description "
"of what the program does and how it works. In help messages, the "
"description is displayed between the command-line usage string and the help "
"messages for the various arguments::"
msgstr ""
#: ../../library/argparse.rst:366
msgid ""
"By default, the description will be line-wrapped so that it fits within the "
"given space. To change this behavior, see the formatter_class_ argument."
msgstr ""
#: ../../library/argparse.rst:371
msgid "epilog"
msgstr ""
#: ../../library/argparse.rst:373
msgid ""
"Some programs like to display additional description of the program after "
"the description of the arguments. Such text can be specified using the "
"``epilog=`` argument to :class:`ArgumentParser`::"
msgstr ""
#: ../../library/argparse.rst:390
msgid ""
"As with the description_ argument, the ``epilog=`` text is by default line-"
"wrapped, but this behavior can be adjusted with the formatter_class_ "
"argument to :class:`ArgumentParser`."
msgstr ""
#: ../../library/argparse.rst:396
msgid "parents"
msgstr ""
#: ../../library/argparse.rst:398
msgid ""
"Sometimes, several parsers share a common set of arguments. Rather than "
"repeating the definitions of these arguments, a single parser with all the "
"shared arguments and passed to ``parents=`` argument to :class:"
"`ArgumentParser` can be used. The ``parents=`` argument takes a list of :"
"class:`ArgumentParser` objects, collects all the positional and optional "
"actions from them, and adds these actions to the :class:`ArgumentParser` "
"object being constructed::"
msgstr ""
#: ../../library/argparse.rst:418
msgid ""
"Note that most parent parsers will specify ``add_help=False``. Otherwise, "
"the :class:`ArgumentParser` will see two ``-h/--help`` options (one in the "
"parent and one in the child) and raise an error."
msgstr ""
#: ../../library/argparse.rst:423
msgid ""
"You must fully initialize the parsers before passing them via ``parents=``. "
"If you change the parent parsers after the child parser, those changes will "
"not be reflected in the child."
msgstr ""
#: ../../library/argparse.rst:431
msgid "formatter_class"
msgstr "formatter_class"
#: ../../library/argparse.rst:433
msgid ""
":class:`ArgumentParser` objects allow the help formatting to be customized "
"by specifying an alternate formatting class. Currently, there are four such "
"classes:"
msgstr ""
#: ../../library/argparse.rst:442
msgid ""
":class:`RawDescriptionHelpFormatter` and :class:`RawTextHelpFormatter` give "
"more control over how textual descriptions are displayed. By default, :class:"
"`ArgumentParser` objects line-wrap the description_ and epilog_ texts in "
"command-line help messages::"
msgstr ""
#: ../../library/argparse.rst:467
msgid ""
"Passing :class:`RawDescriptionHelpFormatter` as ``formatter_class=`` "
"indicates that description_ and epilog_ are already correctly formatted and "
"should not be line-wrapped::"
msgstr ""
#: ../../library/argparse.rst:493
msgid ""
":class:`RawTextHelpFormatter` maintains whitespace for all sorts of help "
"text, including argument descriptions. However, multiple new lines are "
"replaced with one. If you wish to preserve multiple blank lines, add spaces "
"between the newlines."
msgstr ""
#: ../../library/argparse.rst:498
msgid ""
":class:`ArgumentDefaultsHelpFormatter` automatically adds information about "
"default values to each of the argument help messages::"
msgstr ""
#: ../../library/argparse.rst:516
msgid ""
":class:`MetavarTypeHelpFormatter` uses the name of the type_ argument for "
"each argument as the display name for its values (rather than using the "
"dest_ as the regular formatter does)::"
msgstr ""
#: ../../library/argparse.rst:537
msgid "prefix_chars"
msgstr "prefix_chars"
#: ../../library/argparse.rst:539
msgid ""
"Most command-line options will use ``-`` as the prefix, e.g. ``-f/--foo``. "
"Parsers that need to support different or additional prefix characters, e.g. "
"for options like ``+f`` or ``/foo``, may specify them using the "
"``prefix_chars=`` argument to the ArgumentParser constructor::"
msgstr ""
#: ../../library/argparse.rst:551
msgid ""
"The ``prefix_chars=`` argument defaults to ``'-'``. Supplying a set of "
"characters that does not include ``-`` will cause ``-f/--foo`` options to be "
"disallowed."
msgstr ""
#: ../../library/argparse.rst:557
msgid "fromfile_prefix_chars"
msgstr "fromfile_prefix_chars"
#: ../../library/argparse.rst:559
msgid ""
"Sometimes, when dealing with a particularly long argument list, it may make "
"sense to keep the list of arguments in a file rather than typing it out at "
"the command line. If the ``fromfile_prefix_chars=`` argument is given to "
"the :class:`ArgumentParser` constructor, then arguments that start with any "
"of the specified characters will be treated as files, and will be replaced "
"by the arguments they contain. For example::"
msgstr ""
#: ../../library/argparse.rst:574
msgid ""
"Arguments read from a file must by default be one per line (but see also :"
"meth:`~ArgumentParser.convert_arg_line_to_args`) and are treated as if they "
"were in the same place as the original file referencing argument on the "
"command line. So in the example above, the expression ``['-f', 'foo', "
"'@args.txt']`` is considered equivalent to the expression ``['-f', 'foo', '-"
"f', 'bar']``."
msgstr ""
#: ../../library/argparse.rst:580
msgid ""
":class:`ArgumentParser` uses :term:`filesystem encoding and error handler` "
"to read the file containing arguments."
msgstr ""
#: ../../library/argparse.rst:583
msgid ""
"The ``fromfile_prefix_chars=`` argument defaults to ``None``, meaning that "
"arguments will never be treated as file references."
msgstr ""
#: ../../library/argparse.rst:586
msgid ""
":class:`ArgumentParser` changed encoding and errors to read arguments files "
"from default (e.g. :func:`locale.getpreferredencoding(False) <locale."
"getpreferredencoding>` and ``\"strict\"``) to :term:`filesystem encoding and "
"error handler`. Arguments file should be encoded in UTF-8 instead of ANSI "
"Codepage on Windows."
msgstr ""
#: ../../library/argparse.rst:594
msgid "argument_default"
msgstr "argument_default"
#: ../../library/argparse.rst:596
msgid ""
"Generally, argument defaults are specified either by passing a default to :"
"meth:`~ArgumentParser.add_argument` or by calling the :meth:`~ArgumentParser."
"set_defaults` methods with a specific set of name-value pairs. Sometimes "
"however, it may be useful to specify a single parser-wide default for "
"arguments. This can be accomplished by passing the ``argument_default=`` "
"keyword argument to :class:`ArgumentParser`. For example, to globally "
"suppress attribute creation on :meth:`~ArgumentParser.parse_args` calls, we "
"supply ``argument_default=SUPPRESS``::"
msgstr ""
#: ../../library/argparse.rst:616
msgid "allow_abbrev"
msgstr "allow_abbrev"
#: ../../library/argparse.rst:618
msgid ""
"Normally, when you pass an argument list to the :meth:`~ArgumentParser."
"parse_args` method of an :class:`ArgumentParser`, it :ref:`recognizes "
"abbreviations <prefix-matching>` of long options."
msgstr ""
#: ../../library/argparse.rst:622
msgid "This feature can be disabled by setting ``allow_abbrev`` to ``False``::"
msgstr ""
#: ../../library/argparse.rst:635
msgid "conflict_handler"
msgstr "conflict_handler"
#: ../../library/argparse.rst:637
msgid ""
":class:`ArgumentParser` objects do not allow two actions with the same "
"option string. By default, :class:`ArgumentParser` objects raise an "
"exception if an attempt is made to create an argument with an option string "
"that is already in use::"
msgstr ""
#: ../../library/argparse.rst:649
msgid ""
"Sometimes (e.g. when using parents_) it may be useful to simply override any "
"older arguments with the same option string. To get this behavior, the "
"value ``'resolve'`` can be supplied to the ``conflict_handler=`` argument "
"of :class:`ArgumentParser`::"
msgstr ""
#: ../../library/argparse.rst:665
msgid ""
"Note that :class:`ArgumentParser` objects only remove an action if all of "
"its option strings are overridden. So, in the example above, the old ``-f/--"
"foo`` action is retained as the ``-f`` action, because only the ``--foo`` "
"option string was overridden."
msgstr ""
#: ../../library/argparse.rst:672
msgid "add_help"
msgstr "add_help"
#: ../../library/argparse.rst:674
msgid ""
"By default, ArgumentParser objects add an option which simply displays the "
"parser's help message. For example, consider a file named ``myprogram.py`` "
"containing the following code::"
msgstr ""
#: ../../library/argparse.rst:683
msgid ""
"If ``-h`` or ``--help`` is supplied at the command line, the ArgumentParser "
"help will be printed:"
msgstr ""
#: ../../library/argparse.rst:695
msgid ""
"Occasionally, it may be useful to disable the addition of this help option. "
"This can be achieved by passing ``False`` as the ``add_help=`` argument to :"
"class:`ArgumentParser`::"
msgstr ""
#: ../../library/argparse.rst:707
msgid ""
"The help option is typically ``-h/--help``. The exception to this is if the "
"``prefix_chars=`` is specified and does not include ``-``, in which case ``-"
"h`` and ``--help`` are not valid options. In this case, the first character "
"in ``prefix_chars`` is used to prefix the help options::"
msgstr ""
#: ../../library/argparse.rst:722
msgid "exit_on_error"
msgstr "exit_on_error"
#: ../../library/argparse.rst:724
msgid ""
"Normally, when you pass an invalid argument list to the :meth:"
"`~ArgumentParser.parse_args` method of an :class:`ArgumentParser`, it will "
"exit with error info."
msgstr ""
#: ../../library/argparse.rst:727
msgid ""
"If the user would like to catch errors manually, the feature can be enabled "
"by setting ``exit_on_error`` to ``False``::"
msgstr ""
#: ../../library/argparse.rst:744
msgid "The add_argument() method"
msgstr ""
#: ../../library/argparse.rst:750
msgid ""
"Define how a single command-line argument should be parsed. Each parameter "
"has its own more detailed description below, but in short they are:"
msgstr ""
#: ../../library/argparse.rst:753
msgid ""
"`name or flags`_ - Either a name or a list of option strings, e.g. ``foo`` "
"or ``-f, --foo``."
msgstr ""
#: ../../library/argparse.rst:756
msgid ""
"action_ - The basic type of action to be taken when this argument is "
"encountered at the command line."
msgstr ""
#: ../../library/argparse.rst:759
msgid "nargs_ - The number of command-line arguments that should be consumed."
msgstr ""
#: ../../library/argparse.rst:761
msgid ""
"const_ - A constant value required by some action_ and nargs_ selections."
msgstr ""
#: ../../library/argparse.rst:763
msgid ""
"default_ - The value produced if the argument is absent from the command "
"line and if it is absent from the namespace object."
msgstr ""
#: ../../library/argparse.rst:766
msgid ""
"type_ - The type to which the command-line argument should be converted."
msgstr ""
#: ../../library/argparse.rst:768
msgid "choices_ - A sequence of the allowable values for the argument."
msgstr ""
#: ../../library/argparse.rst:770
msgid ""
"required_ - Whether or not the command-line option may be omitted (optionals "
"only)."
msgstr ""
#: ../../library/argparse.rst:773
msgid "help_ - A brief description of what the argument does."
msgstr ""
#: ../../library/argparse.rst:775
msgid "metavar_ - A name for the argument in usage messages."
msgstr ""
#: ../../library/argparse.rst:777
msgid ""
"dest_ - The name of the attribute to be added to the object returned by :"
"meth:`parse_args`."
msgstr ""
#: ../../library/argparse.rst:786
msgid "name or flags"
msgstr ""
#: ../../library/argparse.rst:788
msgid ""
"The :meth:`~ArgumentParser.add_argument` method must know whether an "
"optional argument, like ``-f`` or ``--foo``, or a positional argument, like "
"a list of filenames, is expected. The first arguments passed to :meth:"
"`~ArgumentParser.add_argument` must therefore be either a series of flags, "
"or a simple argument name."
msgstr ""
#: ../../library/argparse.rst:794
msgid "For example, an optional argument could be created like::"
msgstr ""
#: ../../library/argparse.rst:798
msgid "while a positional argument could be created like::"
msgstr ""
#: ../../library/argparse.rst:802
msgid ""
"When :meth:`~ArgumentParser.parse_args` is called, optional arguments will "
"be identified by the ``-`` prefix, and the remaining arguments will be "
"assumed to be positional::"
msgstr ""
#: ../../library/argparse.rst:821
msgid "action"
msgstr ""
#: ../../library/argparse.rst:823
msgid ""
":class:`ArgumentParser` objects associate command-line arguments with "
"actions. These actions can do just about anything with the command-line "
"arguments associated with them, though most actions simply add an attribute "
"to the object returned by :meth:`~ArgumentParser.parse_args`. The "
"``action`` keyword argument specifies how the command-line arguments should "
"be handled. The supplied actions are:"
msgstr ""
#: ../../library/argparse.rst:829
msgid ""
"``'store'`` - This just stores the argument's value. This is the default "
"action. For example::"
msgstr ""
#: ../../library/argparse.rst:837
msgid ""
"``'store_const'`` - This stores the value specified by the const_ keyword "
"argument; note that the const_ keyword argument defaults to ``None``. The "
"``'store_const'`` action is most commonly used with optional arguments that "
"specify some sort of flag. For example::"
msgstr ""
#: ../../library/argparse.rst:847
msgid ""
"``'store_true'`` and ``'store_false'`` - These are special cases of "
"``'store_const'`` used for storing the values ``True`` and ``False`` "
"respectively. In addition, they create default values of ``False`` and "
"``True`` respectively. For example::"
msgstr ""
#: ../../library/argparse.rst:859
msgid ""
"``'append'`` - This stores a list, and appends each argument value to the "
"list. It is useful to allow an option to be specified multiple times. If the "
"default value is non-empty, the default elements will be present in the "
"parsed value for the option, with any values from the command line appended "
"after those default values. Example usage::"
msgstr ""
#: ../../library/argparse.rst:870
msgid ""
"``'append_const'`` - This stores a list, and appends the value specified by "
"the const_ keyword argument to the list; note that the const_ keyword "
"argument defaults to ``None``. The ``'append_const'`` action is typically "
"useful when multiple arguments need to store constants to the same list. For "
"example::"
msgstr ""
#: ../../library/argparse.rst:882
msgid ""
"``'count'`` - This counts the number of times a keyword argument occurs. For "
"example, this is useful for increasing verbosity levels::"
msgstr ""
#: ../../library/argparse.rst:890
msgid "Note, the *default* will be ``None`` unless explicitly set to *0*."
msgstr ""
#: ../../library/argparse.rst:892
msgid ""
"``'help'`` - This prints a complete help message for all the options in the "
"current parser and then exits. By default a help action is automatically "
"added to the parser. See :class:`ArgumentParser` for details of how the "
"output is created."
msgstr ""
#: ../../library/argparse.rst:897
msgid ""
"``'version'`` - This expects a ``version=`` keyword argument in the :meth:"
"`~ArgumentParser.add_argument` call, and prints version information and "
"exits when invoked::"
msgstr ""
#: ../../library/argparse.rst:907
msgid ""
"``'extend'`` - This stores a list, and extends each argument value to the "
"list. Example usage::"
msgstr ""
#: ../../library/argparse.rst:918
msgid ""
"You may also specify an arbitrary action by passing an Action subclass or "
"other object that implements the same interface. The "
"``BooleanOptionalAction`` is available in ``argparse`` and adds support for "
"boolean actions such as ``--foo`` and ``--no-foo``::"
msgstr ""
#: ../../library/argparse.rst:931
msgid ""
"The recommended way to create a custom action is to extend :class:`Action`, "
"overriding the ``__call__`` method and optionally the ``__init__`` and "
"``format_usage`` methods."
msgstr ""
#: ../../library/argparse.rst:935
msgid "An example of a custom action::"
msgstr ""
#: ../../library/argparse.rst:955
msgid "For more details, see :class:`Action`."
msgstr ""
#: ../../library/argparse.rst:961
msgid "nargs"
msgstr ""
#: ../../library/argparse.rst:963
msgid ""
"ArgumentParser objects usually associate a single command-line argument with "
"a single action to be taken. The ``nargs`` keyword argument associates a "
"different number of command-line arguments with a single action. See also :"
"ref:`specifying-ambiguous-arguments`. The supported values are:"
msgstr ""
#: ../../library/argparse.rst:968
msgid ""
"``N`` (an integer). ``N`` arguments from the command line will be gathered "
"together into a list. For example::"
msgstr ""
#: ../../library/argparse.rst:977
msgid ""
"Note that ``nargs=1`` produces a list of one item. This is different from "
"the default, in which the item is produced by itself."
msgstr ""
#: ../../library/argparse.rst:982
msgid ""
"``'?'``. One argument will be consumed from the command line if possible, "
"and produced as a single item. If no command-line argument is present, the "
"value from default_ will be produced. Note that for optional arguments, "
"there is an additional case - the option string is present but not followed "
"by a command-line argument. In this case the value from const_ will be "
"produced. Some examples to illustrate this::"
msgstr ""
#: ../../library/argparse.rst:999
msgid ""
"One of the more common uses of ``nargs='?'`` is to allow optional input and "
"output files::"
msgstr ""
#: ../../library/argparse.rst:1016
msgid ""
"``'*'``. All command-line arguments present are gathered into a list. Note "
"that it generally doesn't make much sense to have more than one positional "
"argument with ``nargs='*'``, but multiple optional arguments with "
"``nargs='*'`` is possible. For example::"
msgstr ""
#: ../../library/argparse.rst:1030
msgid ""
"``'+'``. Just like ``'*'``, all command-line args present are gathered into "
"a list. Additionally, an error message will be generated if there wasn't at "
"least one command-line argument present. For example::"
msgstr ""
#: ../../library/argparse.rst:1042
msgid ""
"If the ``nargs`` keyword argument is not provided, the number of arguments "
"consumed is determined by the action_. Generally this means a single "
"command-line argument will be consumed and a single item (not a list) will "
"be produced."
msgstr ""
#: ../../library/argparse.rst:1050
msgid "const"
msgstr ""