"""A powerful, extensible, and easy-to-use option parser.

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By Greg Ward <gward@python.net>

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Originally distributed as Optik.

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For support, use the optik-users@lists.sourceforge.net mailing list

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(http://lists.sourceforge.net/lists/listinfo/optik-users).

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Simple usage example:

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from optparse import OptionParser

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parser = OptionParser()

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parser.add_option("-f", "--file", dest="filename",

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help="write report to FILE", metavar="FILE")

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parser.add_option("-q", "--quiet",

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action="store_false", dest="verbose", default=True,

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help="don't print status messages to stdout")

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(options, args) = parser.parse_args()

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"""

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__version__ = "1.5.3"

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__all__ = ['Option',

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'make_option',

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'SUPPRESS_HELP',

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'SUPPRESS_USAGE',

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'Values',

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'OptionContainer',

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'OptionGroup',

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'OptionParser',

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'HelpFormatter',

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'IndentedHelpFormatter',

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'TitledHelpFormatter',

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'OptParseError',

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'OptionError',

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'OptionConflictError',

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'OptionValueError',

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'BadOptionError']

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__copyright__ = """

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Copyright (c) 2001-2006 Gregory P. Ward. All rights reserved.

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Copyright (c) 2002-2006 Python Software Foundation. All rights reserved.

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Redistribution and use in source and binary forms, with or without

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modification, are permitted provided that the following conditions are

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met:

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* Redistributions of source code must retain the above copyright

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notice, this list of conditions and the following disclaimer.

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* Redistributions in binary form must reproduce the above copyright

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notice, this list of conditions and the following disclaimer in the

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documentation and/or other materials provided with the distribution.

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* Neither the name of the author nor the names of its

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contributors may be used to endorse or promote products derived from

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this software without specific prior written permission.

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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS

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IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED

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TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A

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PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR

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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING

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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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"""

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import sys, os

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import types

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import textwrap

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def _repr(self):

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return "<%s at 0x%x: %s>" % (self.__class__.__name__, id(self), self)

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# This file was generated from:

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# Id: option_parser.py 527 2006-07-23 15:21:30Z greg

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# Id: option.py 522 2006-06-11 16:22:03Z gward

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# Id: help.py 527 2006-07-23 15:21:30Z greg

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# Id: errors.py 509 2006-04-20 00:58:24Z gward

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try:

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from gettext import gettext

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except ImportError:

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def gettext(message):

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return message

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_ = gettext

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class OptParseError (Exception):

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def __init__(self, msg):

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self.msg = msg

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def __str__(self):

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return self.msg

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class OptionError (OptParseError):

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"""

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Raised if an Option instance is created with invalid or

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inconsistent arguments.

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"""

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def __init__(self, msg, option):

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self.msg = msg

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self.option_id = str(option)

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def __str__(self):

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if self.option_id:

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return "option %s: %s" % (self.option_id, self.msg)

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else:

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return self.msg

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class OptionConflictError (OptionError):

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"""

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Raised if conflicting options are added to an OptionParser.

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"""

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class OptionValueError (OptParseError):

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"""

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Raised if an invalid option value is encountered on the command

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line.

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"""

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class BadOptionError (OptParseError):

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"""

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Raised if an invalid option is seen on the command line.

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"""

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def __init__(self, opt_str):

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self.opt_str = opt_str

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def __str__(self):

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return _("no such option: %s") % self.opt_str

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class AmbiguousOptionError (BadOptionError):

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"""

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Raised if an ambiguous option is seen on the command line.

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"""

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def __init__(self, opt_str, possibilities):

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BadOptionError.__init__(self, opt_str)

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self.possibilities = possibilities

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def __str__(self):

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return (_("ambiguous option: %s (%s?)")

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% (self.opt_str, ", ".join(self.possibilities)))

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class HelpFormatter:

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"""

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Abstract base class for formatting option help. OptionParser

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instances should use one of the HelpFormatter subclasses for

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formatting help; by default IndentedHelpFormatter is used.

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Instance attributes:

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parser : OptionParser

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the controlling OptionParser instance

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indent_increment : int

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the number of columns to indent per nesting level

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max_help_position : int

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the maximum starting column for option help text

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help_position : int

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the calculated starting column for option help text;

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initially the same as the maximum

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width : int

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total number of columns for output (pass None to constructor for

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this value to be taken from the $COLUMNS environment variable)

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level : int

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current indentation level

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current_indent : int

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current indentation level (in columns)

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help_width : int

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number of columns available for option help text (calculated)

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default_tag : str

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text to replace with each option's default value, "%default"

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by default. Set to false value to disable default value expansion.

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option_strings : { Option : str }

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maps Option instances to the snippet of help text explaining

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the syntax of that option, e.g. "-h, --help" or

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"-fFILE, --file=FILE"

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_short_opt_fmt : str

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format string controlling how short options with values are

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printed in help text. Must be either "%s%s" ("-fFILE") or

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"%s %s" ("-f FILE"), because those are the two syntaxes that

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Optik supports.

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_long_opt_fmt : str

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similar but for long options; must be either "%s %s" ("--file FILE")

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or "%s=%s" ("--file=FILE").

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"""

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NO_DEFAULT_VALUE = "none"

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def __init__(self,

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indent_increment,

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max_help_position,

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width,

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short_first):

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self.parser = None

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self.indent_increment = indent_increment

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if width is None:

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try:

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width = int(os.environ['COLUMNS'])

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except (KeyError, ValueError):

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width = 80

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width -= 2

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self.width = width

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self.help_position = self.max_help_position = \

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min(max_help_position, max(width - 20, indent_increment * 2))

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self.current_indent = 0

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self.level = 0

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self.help_width = None # computed later

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self.short_first = short_first

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self.default_tag = "%default"

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self.option_strings = {}

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self._short_opt_fmt = "%s %s"

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self._long_opt_fmt = "%s=%s"

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def set_parser(self, parser):

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self.parser = parser

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def set_short_opt_delimiter(self, delim):

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if delim not in ("", " "):

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raise ValueError(

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"invalid metavar delimiter for short options: %r" % delim)

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self._short_opt_fmt = "%s" + delim + "%s"

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def set_long_opt_delimiter(self, delim):

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if delim not in ("=", " "):

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raise ValueError(

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"invalid metavar delimiter for long options: %r" % delim)

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self._long_opt_fmt = "%s" + delim + "%s"

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def indent(self):

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self.current_indent += self.indent_increment

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self.level += 1

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def dedent(self):

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self.current_indent -= self.indent_increment

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assert self.current_indent >= 0, "Indent decreased below 0."

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self.level -= 1

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def format_usage(self, usage):

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raise NotImplementedError, "subclasses must implement"

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def format_heading(self, heading):

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raise NotImplementedError, "subclasses must implement"

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def _format_text(self, text):

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"""

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Format a paragraph of free-form text for inclusion in the

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help output at the current indentation level.

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"""

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text_width = max(self.width - self.current_indent, 11)

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indent = " "*self.current_indent

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return textwrap.fill(text,

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text_width,

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initial_indent=indent,

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subsequent_indent=indent)

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def format_description(self, description):

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if description:

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return self._format_text(description) + "\n"

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else:

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return ""

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def format_epilog(self, epilog):

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if epilog:

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return "\n" + self._format_text(epilog) + "\n"

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else:

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return ""

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def expand_default(self, option):

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if self.parser is None or not self.default_tag:

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return option.help

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default_value = self.parser.defaults.get(option.dest)

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if default_value is NO_DEFAULT or default_value is None:

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default_value = self.NO_DEFAULT_VALUE

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return option.help.replace(self.default_tag, str(default_value))

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def format_option(self, option):

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# The help for each option consists of two parts:

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# * the opt strings and metavars

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# eg. ("-x", or "-fFILENAME, --file=FILENAME")

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# * the user-supplied help string

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# eg. ("turn on expert mode", "read data from FILENAME")

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#

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# If possible, we write both of these on the same line:

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# -x turn on expert mode

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#

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# But if the opt string list is too long, we put the help

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# string on a second line, indented to the same column it would

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# start in if it fit on the first line.

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# -fFILENAME, --file=FILENAME

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# read data from FILENAME

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result = []

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opts = self.option_strings[option]

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opt_width = self.help_position - self.current_indent - 2

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if len(opts) > opt_width:

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opts = "%*s%s\n" % (self.current_indent, "", opts)

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indent_first = self.help_position

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else: # start help on same line as opts

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opts = "%*s%-*s " % (self.current_indent, "", opt_width, opts)

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indent_first = 0

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result.append(opts)

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if option.help:

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help_text = self.expand_default(option)

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help_lines = textwrap.wrap(help_text, self.help_width)

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result.append("%*s%s\n" % (indent_first, "", help_lines[0]))

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result.extend(["%*s%s\n" % (self.help_position, "", line)

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for line in help_lines[1:]])

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elif opts[-1] != "\n":

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result.append("\n")

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return "".join(result)

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def store_option_strings(self, parser):

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self.indent()

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max_len = 0

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for opt in parser.option_list:

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strings = self.format_option_strings(opt)

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self.option_strings[opt] = strings

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max_len = max(max_len, len(strings) + self.current_indent)

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self.indent()

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for group in parser.option_groups:

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for opt in group.option_list:

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strings = self.format_option_strings(opt)

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self.option_strings[opt] = strings

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max_len = max(max_len, len(strings) + self.current_indent)

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self.dedent()

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self.dedent()

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self.help_position = min(max_len + 2, self.max_help_position)

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self.help_width = max(self.width - self.help_position, 11)

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def format_option_strings(self, option):

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"""Return a comma-separated list of option strings & metavariables."""

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if option.takes_value():

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metavar = option.metavar or option.dest.upper()

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short_opts = [self._short_opt_fmt % (sopt, metavar)

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for sopt in option._short_opts]

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long_opts = [self._long_opt_fmt % (lopt, metavar)

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for lopt in option._long_opts]

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else:

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short_opts = option._short_opts

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long_opts = option._long_opts

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if self.short_first:

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opts = short_opts + long_opts

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else:

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opts = long_opts + short_opts

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return ", ".join(opts)

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class IndentedHelpFormatter (HelpFormatter):

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"""Format help with indented section bodies.

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"""

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def __init__(self,

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indent_increment=2,

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max_help_position=24,

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width=None,

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short_first=1):

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HelpFormatter.__init__(

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self, indent_increment, max_help_position, width, short_first)

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def format_usage(self, usage):

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return _("Usage: %s\n") % usage

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def format_heading(self, heading):

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return "%*s%s:\n" % (self.current_indent, "", heading)

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class TitledHelpFormatter (HelpFormatter):

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"""Format help with underlined section headers.

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"""

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def __init__(self,

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indent_increment=0,

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max_help_position=24,

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width=None,

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short_first=0):

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HelpFormatter.__init__ (

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self, indent_increment, max_help_position, width, short_first)

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def format_usage(self, usage):

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return "%s %s\n" % (self.format_heading(_("Usage")), usage)

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def format_heading(self, heading):

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return "%s\n%s\n" % (heading, "=-"[self.level] * len(heading))

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def _parse_num(val, type):

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if val[:2].lower() == "0x": # hexadecimal

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radix = 16

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elif val[:2].lower() == "0b": # binary

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radix = 2

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val = val[2:] or "0" # have to remove "0b" prefix

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elif val[:1] == "0": # octal

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radix = 8

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else: # decimal

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radix = 10

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return type(val, radix)

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def _parse_int(val):

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return _parse_num(val, int)

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def _parse_long(val):

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return _parse_num(val, long)

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_builtin_cvt = { "int" : (_parse_int, _("integer")),

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"long" : (_parse_long, _("long integer")),

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"float" : (float, _("floating-point")),

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"complex" : (complex, _("complex")) }

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def check_builtin(option, opt, value):

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(cvt, what) = _builtin_cvt[option.type]

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try:

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return cvt(value)

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except ValueError:

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raise OptionValueError(

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_("option %s: invalid %s value: %r") % (opt, what, value))

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def check_choice(option, opt, value):

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if value in option.choices:

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return value

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else:

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choices = ", ".join(map(repr, option.choices))

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raise OptionValueError(

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_("option %s: invalid choice: %r (choose from %s)")

[437] Fix | Delete

% (opt, value, choices))

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# Not supplying a default is different from a default of None,

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# so we need an explicit "not supplied" value.

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NO_DEFAULT = ("NO", "DEFAULT")

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class Option:

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"""

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Instance attributes:

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_short_opts : [string]

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_long_opts : [string]

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action : string

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type : string

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dest : string

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default : any

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nargs : int

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const : any

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choices : [string]

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callback : function

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callback_args : (any*)

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callback_kwargs : { string : any }

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help : string

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metavar : string

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"""

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# The list of instance attributes that may be set through

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# keyword args to the constructor.

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ATTRS = ['action',

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'type',

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'dest',

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'default',

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'nargs',

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'const',

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'choices',

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'callback',

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'callback_args',

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'callback_kwargs',

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'help',

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'metavar']

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# The set of actions allowed by option parsers. Explicitly listed

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# here so the constructor can validate its arguments.

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ACTIONS = ("store",

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"store_const",

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"store_true",

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"store_false",

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"append",

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"append_const",

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"count",

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"callback",

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"help",

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"version")

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# The set of actions that involve storing a value somewhere;

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# also listed just for constructor argument validation. (If

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# the action is one of these, there must be a destination.)

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STORE_ACTIONS = ("store",

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"store_const",

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"store_true",

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"store_false",

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