How to set custom error messages for argparse python module

Question

I want to change default message for errors caused by typing wrong argument value or typing argument without any value.

I have code test.py:

import argparse


parser = argparse.ArgumentParser()

parser.add_argument('-n',
                    '--number',
                    type=int,
                    help='Specify a number to print',
                    required=False)

args = parser.parse_args()


if __name__ == "__main__":
    if not args.number:
        print("Hello")
    else:
        print(args.number)

And when i'm typing python test.py i have output Hello

When i'm typing python test.py --number 1 i have output 1

But when i'm typing python test.py --number i've got:
test.py: error: argument -n/--number: expected one argument

But i want to have custom message in that output like "Please write number to print" - How i can "catch" error from argparser and customize the message of it

Also i want to have same error message when i'll get invalid int value

like in example:
python test.py --number k
test.py: error: argument -n/--number: invalid int value: 'k'

And i want:
python test.py --number k
Please write number to print
python test.py --number
Please write number to print