Simple Password Generator Python

pass-gen.py

import string
import secrets
import sys
alphabet = string.ascii_letters + string.digits

def generatePass():
    while True:
        password = ''.join(secrets.choice(alphabet) for i in range(10))
        if (any(c.islower() for c in password)
                and any(c.isupper() for c in password)
                and sum(c.isdigit() for c in password) >= 3):
            return password

def main(total_number):
    with open("pass-list.txt", "w") as f:
        for i in range(total_number):
            f.write(generatePass())
            f.write("\n")
            
if __name__ == '__main__':
    arg_num = len(sys.argv)
    if (arg_num == 2):
        total_number = int(sys.argv[1])
        main(total_number)
    elif (arg_num == 1):
        main(1000)
    else:
        print('Please run with argument or not have any argument, example "python pass-gen.py" or "python pass-gen.py 1000" without double quote.')