The **`argparse`** module provides a convenient interface to handle command-line arguments. It displays the generic usage of the program, help, and errors.

# Explanation
The **`parse_args()`** function of the `ArgumentParser` class parses arguments and the **`add_argument()`** function adds arguments to be accepted from the user.

The user-supplied arguments and their values are verified by the `parse_arg()` function for errors. If the user supplies ambiguous arguments, invalid types, wrong names, or an incorrect number of arguments, the program exits, and the usage and error are displayed.

## Examples
The following example demonstrates what some of the invalid argument types are.

### Example 1
The following example provides an invalid value type for the argument `-r`:

import math
import argparse

# create an ArgumentParser object
parser = argparse.ArgumentParser()
# add arguments
parser.add_argument('-r', type = int)
parser.add_argument('--foo', type = int)
args = parser.parse_args('-r abc'.split())
print(args)

### Example 2
The following example provides an invalid argument name:

import math
import argparse

# create an ArgumentParser object
parser = argparse.ArgumentParser()
# add arguments
parser.add_argument('-r', type = int)
parser.add_argument('--foo', type = int)
args = parser.parse_args('--bar'.split())
print(args)

### Example 3
The following example provides an invalid number of arguments:

import math
import argparse

# create an ArgumentParser object
parser = argparse.ArgumentParser()
# add arguments
parser.add_argument('r', type = int)
parser.add_argument('foo', type = int)
args = parser.parse_args('10 8 3'.split())
print(args)

What are invalid arguments in argparse Python?

The argparse module checks and handles invalid command-line arguments, displaying usage and errors.