Answer to Question #327895 in Python for chinna

Question

validation:

username should be in between 4 and 25

should start with letters but not underscore

should not be special characters

input:

google

output:

true

input:

google@123

output:

false

Answer 1

import string 
def validate(name):
    if len(name) < 4 or len(name) > 25:
        return False
    
    if name[0] not in string.ascii_letters:
        return False


    for ch in name:
        if (ch not in string.ascii_letters and 
            ch not in string.digits and ch != '_'):
            return False
    return True


def main():
    name = input()
    if validate(name):
        print('true')
    else:
        print('false')


if __name__ == '__main__':
    main()