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diff --git a/Doc/library/packaging.fancy_getopt.rst b/Doc/library/packaging.fancy_getopt.rst new file mode 100644 index 0000000..2c69341 --- /dev/null +++ b/Doc/library/packaging.fancy_getopt.rst @@ -0,0 +1,75 @@ +:mod:`packaging.fancy_getopt` --- Wrapper around the getopt module +================================================================== + +.. module:: packaging.fancy_getopt + :synopsis: Additional getopt functionality. + + +.. warning:: + This module is deprecated and will be replaced with :mod:`optparse`. + +This module provides a wrapper around the standard :mod:`getopt` module that +provides the following additional features: + +* short and long options are tied together + +* options have help strings, so :func:`fancy_getopt` could potentially create a + complete usage summary + +* options set attributes of a passed-in object + +* boolean options can have "negative aliases" --- e.g. if :option:`--quiet` is + the "negative alias" of :option:`--verbose`, then :option:`--quiet` on the + command line sets *verbose* to false. + +.. function:: fancy_getopt(options, negative_opt, object, args) + + Wrapper function. *options* is a list of ``(long_option, short_option, + help_string)`` 3-tuples as described in the constructor for + :class:`FancyGetopt`. *negative_opt* should be a dictionary mapping option names + to option names, both the key and value should be in the *options* list. + *object* is an object which will be used to store values (see the :meth:`getopt` + method of the :class:`FancyGetopt` class). *args* is the argument list. Will use + ``sys.argv[1:]`` if you pass ``None`` as *args*. + + +.. class:: FancyGetopt([option_table=None]) + + The option_table is a list of 3-tuples: ``(long_option, short_option, + help_string)`` + + If an option takes an argument, its *long_option* should have ``'='`` appended; + *short_option* should just be a single character, no ``':'`` in any case. + *short_option* should be ``None`` if a *long_option* doesn't have a + corresponding *short_option*. All option tuples must have long options. + +The :class:`FancyGetopt` class provides the following methods: + + +.. method:: FancyGetopt.getopt([args=None, object=None]) + + Parse command-line options in args. Store as attributes on *object*. + + If *args* is ``None`` or not supplied, uses ``sys.argv[1:]``. If *object* is + ``None`` or not supplied, creates a new :class:`OptionDummy` instance, stores + option values there, and returns a tuple ``(args, object)``. If *object* is + supplied, it is modified in place and :func:`getopt` just returns *args*; in + both cases, the returned *args* is a modified copy of the passed-in *args* list, + which is left untouched. + + .. TODO and args returned are? + + +.. method:: FancyGetopt.get_option_order() + + Returns the list of ``(option, value)`` tuples processed by the previous run of + :meth:`getopt` Raises :exc:`RuntimeError` if :meth:`getopt` hasn't been called + yet. + + +.. method:: FancyGetopt.generate_help([header=None]) + + Generate help text (a list of strings, one per suggested line of output) from + the option table for this :class:`FancyGetopt` object. + + If supplied, prints the supplied *header* at the top of the help. |