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Pranav Srinivas Kumar 2019-04-01 20:52:36 -04:00 committed by GitHub
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@ -116,6 +116,22 @@ $ ./main --verbose 4
The square of 4 is 16 The square of 4 is 16
``` ```
### Printing Help
```ArgumentParser.print_help()``` print a help message, including the program usage and information about the arguments registered with the ArgumentParser. For the previous example, here's the default help message:
```bash
$ ./main --help
Usage: ./main [options] square
Positional arguments:
square display a square of a given number
Optional arguments:
-h, --help show this help message and exit
-v, --verbose enable verbose logging
```
### List of Arguments ### List of Arguments
ArgumentParser objects usually associate a single command-line argument with a single action to be taken. The ```.nargs``` associates a different number of command-line arguments with a single action. When using ```nargs(N)```, N arguments from the command line will be gathered together into a list. ArgumentParser objects usually associate a single command-line argument with a single action to be taken. The ```.nargs``` associates a different number of command-line arguments with a single action. When using ```nargs(N)```, N arguments from the command line will be gathered together into a list.