| %(option)s option requires %(number)d argument | |
| %prog [options] | |
| %s option does not take a value | |
| Options | |
| Usage | |
| Usage: %s\n | |
| ambiguous option: %s (%s?) | |
| complex | |
| floating-point | |
| integer | |
| no such option: %s | |
| option %s: invalid %s value: %r | |
| option %s: invalid choice: %r (choose from %s) | |
| show program's version number and exit | |
| show this help message and exit |