| 2201 | |
| 2202 | # function to convert arg_strings into an optional action |
| 2203 | def consume_optional(start_index): |
| 2204 | |
| 2205 | # get the optional identified at this index |
| 2206 | option_tuples = option_string_indices[start_index] |
| 2207 | # if multiple actions match, the option string was ambiguous |
| 2208 | if len(option_tuples) > 1: |
| 2209 | options = ', '.join([option_string |
| 2210 | for action, option_string, sep, explicit_arg in option_tuples]) |
| 2211 | args = {'option': arg_strings[start_index], 'matches': options} |
| 2212 | msg = _('ambiguous option: %(option)s could match %(matches)s') |
| 2213 | raise ArgumentError(None, msg % args) |
| 2214 | |
| 2215 | action, option_string, sep, explicit_arg = option_tuples[0] |
| 2216 | |
| 2217 | # identify additional optionals in the same arg string |
| 2218 | # (e.g. -xyz is the same as -x -y -z if no args are required) |
| 2219 | match_argument = self._match_argument |
| 2220 | action_tuples = [] |
| 2221 | while True: |
| 2222 | |
| 2223 | # if we found no optional action, skip it |
| 2224 | if action is None: |
| 2225 | extras.append(arg_strings[start_index]) |
| 2226 | extras_pattern.append('O') |
| 2227 | return start_index + 1 |
| 2228 | |
| 2229 | # if there is an explicit argument, try to match the |
| 2230 | # optional's string arguments to only this |
| 2231 | if explicit_arg is not None: |
| 2232 | arg_count = match_argument(action, 'A') |
| 2233 | |
| 2234 | # if the action is a single-dash option and takes no |
| 2235 | # arguments, try to parse more single-dash options out |
| 2236 | # of the tail of the option string |
| 2237 | chars = self.prefix_chars |
| 2238 | if ( |
| 2239 | arg_count == 0 |
| 2240 | and option_string[1] not in chars |
| 2241 | and explicit_arg != '' |
| 2242 | ): |
| 2243 | if sep or explicit_arg[0] in chars: |
| 2244 | msg = _('ignored explicit argument %r') |
| 2245 | raise ArgumentError(action, msg % explicit_arg) |
| 2246 | action_tuples.append((action, [], option_string)) |
| 2247 | char = option_string[0] |
| 2248 | option_string = char + explicit_arg[0] |
| 2249 | optionals_map = self._option_string_actions |
| 2250 | if option_string in optionals_map: |
| 2251 | action = optionals_map[option_string] |
| 2252 | explicit_arg = explicit_arg[1:] |
| 2253 | if not explicit_arg: |
| 2254 | sep = explicit_arg = None |
| 2255 | elif explicit_arg[0] == '=': |
| 2256 | sep = '=' |
| 2257 | explicit_arg = explicit_arg[1:] |
| 2258 | else: |
| 2259 | sep = '' |
| 2260 | else: |