Fetch named command line arguments in Python Script

fetchParam.py

import argparse

parser = argparse.ArgumentParser()
# String Argument
parser.add_argument('-c','--compName', type=str, metavar='compName', help='Competitor name as Input', required=True);
# Optional Integer Arguement, 
parser.add_argument('-l','--limit', type=int, metavar='limit', help='Number of recrods to fetch', required=False);
# Date arguement with format validation
def lambda_date_args(s):
    if(s is not None or s != '' ):
        return  datetime.strptime(s, '%Y-%m-%d')
parser.add_argument('-s','--startDate', type=lambda_date_args, metavar='startDate', help='Start Date as Input', required=False);

# Extracting the parameters
args = parser.parse_args()
compName = args.compName
limit = args.limit
startDate = args.startDate