def _grok_option_table (self):
        """Populate the various data structures that keep tabs on the
        option table.  Called by 'getopt()' before it can do anything
        worthwhile.
        """
        self.long_opts = []
        self.short_opts = []
        self.short2long.clear()
        self.repeat = {}

        for option in self.option_table:
            if len(option) == 3:
                long, short, help = option
                repeat = 0
            elif len(option) == 4:
                long, short, help, repeat = option
            else:
                # the option table is part of the code, so simply
                # assert that it is correct
                raise ValueError, "invalid option tuple: %r" % (option,)

            # Type- and value-check the option names
            if not isinstance(long, str) or len(long) < 2:
                raise DistutilsGetoptError, \
                      ("invalid long option '%s': "
                       "must be a string of length >= 2") % long

            if (not ((short is None) or
                     (isinstance(short, str) and len(short) == 1))):
                raise DistutilsGetoptError, \
                      ("invalid short option '%s': "
                       "must a single character or None") % short

            self.repeat[long] = repeat
            self.long_opts.append(long)

            if long[-1] == '=':             # option takes an argument?
                if short: short = short + ':'
                long = long[0:-1]
                self.takes_arg[long] = 1
            else:

                # Is option is a "negative alias" for some other option (eg.
                # "quiet" == "!verbose")?
                alias_to = self.negative_alias.get(long)
                if alias_to is not None:
                    if self.takes_arg[alias_to]:
                        raise DistutilsGetoptError, \
                              ("invalid negative alias '%s': "
                               "aliased option '%s' takes a value") % \
                               (long, alias_to)

                    self.long_opts[-1] = long # XXX redundant?!
                    self.takes_arg[long] = 0

                else:
                    self.takes_arg[long] = 0

            # If this is an alias option, make sure its "takes arg" flag is
            # the same as the option it's aliased to.
            alias_to = self.alias.get(long)
            if alias_to is not None:
                if self.takes_arg[long] != self.takes_arg[alias_to]:
                    raise DistutilsGetoptError, \
                          ("invalid alias '%s': inconsistent with "
                           "aliased option '%s' (one of them takes a value, "
                           "the other doesn't") % (long, alias_to)


            # Now enforce some bondage on the long option name, so we can
            # later translate it to an attribute name on some object.  Have
            # to do this a bit late to make sure we've removed any trailing
            # '='.
            if not longopt_re.match(long):
                raise DistutilsGetoptError, \
                      ("invalid long option name '%s' " +
                       "(must be letters, numbers, hyphens only") % long

            self.attr_name[long] = self.get_attr_name(long)
            if short:
                self.short_opts.append(short)
                self.short2long[short[0]] = long

        # for option_table

    # _grok_option_table()
dataset/ETHPy150Open azoft-dev-team/imagrium/env/Lib/distutils/fancy_getopt.py/FancyGetopt._grok_option_table/original