argparses
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命令行交互的核心
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argparse — Parser for command-line options, arguments and sub-commands
Argparse
| Name | Description | Values |
|---|---|---|
| action | Specify how an argument should be handled | 'store', 'store_const', 'store_true', 'append', 'append_const', 'count', 'help', 'version' |
| choices | Limit values to a specific set of choices | ['foo', 'bar'], range(1, 10), or Container instance |
| const | Store a constant value | |
| default | Default value used when an argument is not provided | Defaults to None |
| dest | Specify the attribute name used in the result namespace | |
| help | Help message for an argument | |
| metavar | Alternate display name for the argument as shown in help | |
| nargs | Number of times the argument can be used | int, '?', '*', or '+' |
| required | Indicate whether an argument is required or optional | True or False |
| type | Automatically convert an argument to the given type | int, float, argparse.FileType('w'), or callable function |