)fddZdZgdZddlZddlZddlZddl Z ddl m Z m Z dZ dZdZd Zd Zd Zd ZGd deZdZGddeZGddeZGddeZGddeZGddeZdZGddeZGddeZGdd eZ Gd!d"e Z!Gd#d$e Z"Gd%d&e Z#Gd'd(e#Z$Gd)d*e#Z%Gd+d,e Z&Gd-d.e Z'Gd/d0e Z(Gd1d2e Z)Gd3d4e Z*Gd5d6e Z+Gd7d8e&Z,Gd9d:eZ-Gd;deZ/Gd?d@e/Z0GdAdBe0Z1GdCdDee/Z2dS)Ea Command-line parsing library This module is an optparse-inspired command-line parsing library that: - handles both optional and positional arguments - produces highly informative usage messages - supports parsers that dispatch to sub-parsers The following is a simple usage example that sums integers from the command-line and writes the result to a file:: parser = argparse.ArgumentParser( description='sum the integers at the command line') parser.add_argument( 'integers', metavar='int', nargs='+', type=int, help='an integer to be summed') parser.add_argument( '--log', default=sys.stdout, type=argparse.FileType('w'), help='the file where the sum should be written') args = parser.parse_args() args.log.write('%s' % sum(args.integers)) args.log.close() The module contains the following public classes: - ArgumentParser -- The main entry point for command-line parsing. As the example above shows, the add_argument() method is used to populate the parser with actions for optional and positional arguments. Then the parse_args() method is invoked to convert the args at the command-line into an object with attributes. - ArgumentError -- The exception raised by ArgumentParser objects when there are errors with the parser's actions. Errors raised while parsing the command-line are caught by ArgumentParser and emitted as command-line messages. - FileType -- A factory for defining types of files to be created. As the example above shows, instances of FileType are typically passed as the type= argument of add_argument() calls. - Action -- The base class for parser actions. Typically actions are selected by passing strings like 'store_true' or 'append_const' to the action= argument of add_argument(). However, for greater customization of ArgumentParser actions, subclasses of Action may be defined and passed as the action= argument. - HelpFormatter, RawDescriptionHelpFormatter, RawTextHelpFormatter, ArgumentDefaultsHelpFormatter -- Formatter classes which may be passed as the formatter_class= argument to the ArgumentParser constructor. HelpFormatter is the default, RawDescriptionHelpFormatter and RawTextHelpFormatter tell the parser not to change the formatting for help text, and ArgumentDefaultsHelpFormatter adds information about argument defaults to the help. All other classes in this module are considered implementation details. (Also note that HelpFormatter and RawDescriptionHelpFormatter are only considered public as object names -- the API of the formatter objects is still considered an implementation detail.) z1.1)ArgumentParser ArgumentErrorArgumentTypeErrorBooleanOptionalActionFileType HelpFormatterArgumentDefaultsHelpFormatterRawDescriptionHelpFormatterRawTextHelpFormatterMetavarTypeHelpFormatter NamespaceAction ONE_OR_MOREOPTIONALPARSER REMAINDERSUPPRESS ZERO_OR_MOREN)gettextngettextz ==SUPPRESS==?*+zA......_unrecognized_argsc$eZdZdZdZdZdZdS)_AttributeHolderaAbstract base class that provides __repr__. The __repr__ method returns a string in the format:: ClassName(attr=name, attr=name, ...) 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ArgumentDefaultsHelpFormatter and BooleanOptionalAction when it isn't already present. This code will do that, detecting cornercases to prevent duplicates or cases where it wouldn't make sense to the end user. Nruz %(default)z (default: %(default)s))rrrrrrrry)r+rrdefaulting_nargss r2rz.ArgumentDefaultsHelpFormatter._get_help_stringsh{ <D t # #~X--$,l#; (9FLr?rr<r4r2rrs- r4rceZdZdZdZdZdS)r a Help message formatter which uses the argument 'type' as the default metavar value (instead of the argument 'dest') Only the name of this class is considered a public API. All the methods provided by the class are considered an implementation detail. c|jjSr6r#r$r%s r2rz:MetavarTypeHelpFormatter._get_default_metavar_for_optional {##r4c|jjSr6r9r%s r2rzr?rrr<r4r2r r s<$$$$$$$$r4r c|dS|jrd|jS|jdtfvr|jS|jdtfvr|jS|jr dd|jzdzSdS)N/{r})rr*rrr(r)arguments r2_get_action_namerAst  xx/000  $!1 1 1 tX. . .}  SXXh.///#55tr4ceZdZdZdZdZdS)rzAn error from creating or using an argument (optional or positional). The string value of this exception is the message, augmented with information about the argument that caused it. c<t||_||_dSr6)rA argument_namemessage)r+r@rEs r2razArgumentError.__init__s-h77 r4cp|jd}ntd}|t|j|jzS)Nz %(message)sz'argument %(argument_name)s: %(message)s)rErD)rDryrzrE)r+rs r2__str__zArgumentError.__str__sH   %"FF@AAFT\+/+=???? ?r4N)r$r=r>r?rarGr<r4r2rrs< ?????r4rceZdZdZdS)rz@An error from trying to convert a command line string to a type.N)r$r=r>r?r<r4r2rrsJJDr4rc>eZdZdZ ddZdZdZd dZdS) r a\ Information about how to convert command line strings to Python objects. Action objects are used by an ArgumentParser to represent the information needed to parse a single argument from one or more strings from the command line. The keyword arguments to the Action constructor are also all attributes of Action instances. Keyword Arguments: - option_strings -- A list of command-line option strings which should be associated with this action. - dest -- The name of the attribute to hold the created object(s) - nargs -- The number of command-line arguments that should be consumed. By default, one argument will be consumed and a single value will be produced. Other values include: - N (an integer) consumes N arguments (and produces a list) - '?' consumes zero or one arguments - '*' consumes zero or more arguments (and produces a list) - '+' consumes one or more arguments (and produces a list) Note that the difference between the default and nargs=1 is that with the default, a single value will be produced, while with nargs=1, a list containing a single value will be produced. - const -- The value to be produced if the option is specified and the option uses an action that takes no values. - default -- The value to be produced if the option is not specified. - type -- A callable that accepts a single string argument, and returns the converted value. The standard Python types str, int, float, and complex are useful examples of such callables. If None, str is used. - choices -- A container of values that should be allowed. If not None, after a command-line argument has been converted to the appropriate type, an exception will be raised if it is not a member of this collection. - required -- True if the action must always be specified at the command line. This is only meaningful for optional command-line arguments. - help -- The help string describing the argument. - metavar -- The name to be used for the option's argument with the help string. If None, the 'dest' value will be used as the name. NFc ||_||_||_||_||_||_||_||_| |_| |_ dSr6 rr(rconstrr#rrrr) r+rr(rrLrr#rrrrs r2razAction.__init__LsO-          r4c(gd}fd|DS)NrKc4g|]}|t|fSr<getattrrqr0r+s r2rtz&Action._get_kwargs..o(>>>wtT**+>>>r4r<r+namess` r2r(zAction._get_kwargsbs0    ?>>>>>>>r4c|jdSrArr:s r2rzAction.format_usageqs"1%%r4c:ttd)Nz.__call__() not defined)NotImplementedErrorryr+parser namespacevaluesrs r2__call__zAction.__call__ts!!$=">">???r4NNNNNFNNr6)r$r=r>r?rar(rr]r<r4r2r r s00j, ? ? ?&&&@@@@@@r4r c:eZdZ dfd ZddZdZxZS)rNFc g} |D]N} | | | dr"d| ddz} | | Ot| |d|||||| dS)N----no-rEr) rr(rrr#rrrr)r& startswithsuperra) r+rr(rr#rrrr_option_stringsr __class__s r2razBooleanOptionalAction.__init__ys+ 6 6M  " "= 1 1 1''-- 6 '-*; ; &&}555 *      r4cp||jvr,t||j|d dSdS)Nrb)rsetattrr(rcrYs r2r]zBooleanOptionalAction.__call__sC D/ / / Itym.F.Fw.O.O*O P P P P P 0 /r4c6d|jS)Nz | )r*rr:s r2rz"BooleanOptionalAction.format_usageszz$-...r4)NNNFNNr6)r$r=r>rar]r __classcell__rfs@r2rrxsx<QQQQ///////r4rc8eZdZ dfd ZddZxZS) _StoreActionNFc |dkrtd|"|tkrtdtztt|||||||||| |  dS)Nrznargs for store actions must be != 0; if you have nothing to store, actions such as store true or store const may be more appropriate nargs must be %r to supply constrK)rrrdrmra r+rr(rrLrr#rrrrrfs r2raz_StoreAction.__init__s A::KLL L  (!2!2?(JKK K lD!!**) +     r4c2t||j|dSr6)rhr(rYs r2r]z_StoreAction.__call__s 49f-----r4r^r6r$r=r>rar]rjrks@r2rmrmsk :........r4rmc2eZdZ dfd ZddZxZS)_StoreConstActionNFc ftt|||d||||dS)Nr)rr(rrLrrr)rdrtra r+rr(rLrrrrrfs r2raz_StoreConstAction.__init__sL &&//) 0     r4c<t||j|jdSr6)rhr(rLrYs r2r]z_StoreConstAction.__call__s 49dj11111r4NNFNNr6rrrks@r2rtrtsb "22222222r4rtc&eZdZ dfd ZxZS)_StoreTrueActionFNcdtt|||d|||dS)NTrr(rLrrr)rdrzrar+rr(rrrrfs r2raz_StoreTrueAction.__init__sI %%..) /     r4)FFNr$r=r>rarjrks@r2rzrzsH           r4rzc&eZdZ dfd ZxZS)_StoreFalseActionTFNcdtt|||d|||dS)NFr|)rdrrar}s r2raz_StoreFalseAction.__init__sI &&//) 0     r4)TFNr~rks@r2rrsH           r4rc8eZdZ dfd ZddZxZS) _AppendActionNFc |dkrtd|"|tkrtdtztt|||||||||| |  dS)Nrznargs for append actions must be != 0; if arg strings are not supplying the value to append, the append const action may be more appropriaterorK)rrrdrrarps r2raz_AppendAction.__init__s A::OPP P  (!2!2?(JKK K mT""++) ,     r4ct||jd}t|}||t ||j|dSr6)rPr(rCr&rhr+rZr[r\rr9s r2r]z_AppendAction.__call__N 49d33E"" V 49e,,,,,r4r^r6rrrks@r2rrsk :--------r4rc2eZdZ dfd ZddZxZS)_AppendConstActionNFc htt|||d|||||dS)Nr)rr(rrLrrrr)rdrrarvs r2raz_AppendConstAction.__init__#sO  $''00) 1     r4ct||jd}t|}||jt ||j|dSr6)rPr(rCr&rLrhrs r2r]z_AppendConstAction.__call__5sP 49d33E"" TZ    49e,,,,,r4rxr6rrrks@r2rr!sb $--------r4rc.eZdZ dfd ZddZxZS) _CountActionNFcdtt|||d|||dS)Nr)rr(rrrr)rdrrar}s r2raz_CountAction.__init__>sH lD!!**) +     r4clt||jd}|d}t||j|dzdSNrrd)rPr(rh)r+rZr[r\rcounts r2r]z_CountAction.__call__Ls= 49d33 =E 49eai00000r4)NFNr6rrrks@r2rr<s\       11111111r4rc.eZdZeedffd ZddZxZS) _HelpActionNcbtt||||d|dS)Nrrr(rrr)rdrra)r+rr(rrrfs r2raz_HelpAction.__init__UsE k4  ))) *     r4cV||dSr6) print_helpexitrYs r2r]z_HelpAction.__call__as% r4r6r$r=r>rrar]rjrks@r2rrSs\!      r4rc0eZdZdeedffd ZddZxZS)_VersionActionNc|td}tt||||d|||_dS)Nz&show program's version number and exitrr)ryrdrraversion)r+rrr(rrrfs r2raz_VersionAction.__init__hs[ <=>>D nd##,,) -     r4c|j}||j}|}||||t j|dSr6)r_get_formatterr_print_messager~_sysstdoutr)r+rZr[r\rrrls r2r]z_VersionAction.__call__xso, ?nG))++ 7###i3355t{CCC r4r6rrks@r2rrfs_!  r4rcXeZdZGddeZedddffd ZdZdZd dZ xZ S) _SubParsersActionceZdZfdZxZS)&_SubParsersAction._ChoicesPseudoActionc|x}}|r|dd|zz }ttj|}|g|||dS)Nrr!)rr(rr)r*rdr_ChoicesPseudoActionra)r+r0aliasesrrr(suprfs r2raz/_SubParsersAction._ChoicesPseudoAction.__init__sq! !Gd 87TYYw%7%777)>EEC LLD!(  * * * * *r4r~rks@r2rrs8 * * * * * * * * *r4rFNc ||_||_i|_g|_t t |||t|j|||dS)N)rr(rrrrr) _prog_prefix _parser_class_name_parser_map_choices_actionsrdrrar) r+rr] parser_classr(rrrrfs r2raz_SubParsersAction.__init__so!) " " &&//)) 0     r4c |d|jd||d<|dd}||jvr t |t d|z|D]+}||jvr t |t d|z,d|vrF|d}||||}|j||j di|}||j|<|D] }||j|< |S)Nr]rrr<zconflicting subparser: %szconflicting subparser alias: %sr) rrrrrryrrr&r)r+r0kwargsraliasr choice_actionrZs r2 add_parserz_SubParsersAction.add_parsersQ ::f   %(,(9(9(944@F6N**Y++ 4( ( (a(C&D&Dt&KLL L H HE---#!=>>FHHH. V  ::f%%D 55dGTJJM  ! 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