Argument parser Python 3

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i'm trying to take an argument from the user to connect to a specific port number

while trying to take the argument

Python

import argparse

args = argparse.ArgumentParser()
args.add_argument("-p", "-port", help="Please enter the port number",action="store_true")
if args.port:
    print("You entered this [" + str(args.port) + "] port number are you sure ??")

i got this error

if args.port:
AttributeError: 'ArgumentParser' object has no attribute 'port'

What I have tried:

Python

import argparse

args = argparse.ArgumentParser()
args.add_argument("-p", "-port", help="Please enter the port number",action="store_true")
if args.port:
    print("You entered this [" + str(args.port) + "] port number are you sure ??")

Posted 7-Dec-18 14:38pm

Member 12173667

Updated 7-Dec-18 23:02pm

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Richard MacCutchan · Accepted Answer · 2018-12-07T23:02:00

You need to call parse_args() after adding your arguments, and also a double -- in front of the argument name. Try:

Python

import argparse
args = argparse.ArgumentParser()
args.add_argument("-p", "--port", help="Please enter the port number",action="store_true")
args.parse_args()

Also note that this parser will not accept any argument value, since port is defined as "store_true"

Argument parser Python 3

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Argument parser Python 3

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