Basic Master Login App - Python

from sys import *
from pathlib import Path
from os import stat

def view():
    contents = ''
    try:
        if stat('logins.gco').st_size > 0:
            file = open("logins.gco", "r")
            contents = file.read()
            file.close()
        else:
            print('File is empty.')
            contents = None
    except Exception as e:
        print('There is no file currently saved.')
        print('Would you like to create a file to save to? (y/n)')
        make_file = input('> ').lower()
        if make_file == 'y':
            file = open('logins.gco', 'w')
            if stat('logins.gco').st_size == 0:
                print('A new file was created!')
                print('No logins to view!')
        else:
            print('No file was created!')
            print('To view saved longins, please add a login.')
    return contents

def add(name, password):
    user_name = name
    user_password = password

    file = open("logins.gco", "a")
    file.write(f'{user_name}:{user_password}\n')
    file.close()

key_file = Path('master.gco')
master_key = ''
if key_file.exists():
    file = open('master.gco', 'r')
    master_key = file.readline()
    file.close()
else:
    print('A master key does not seem to exist for this program.\n Please enter one:')
    master_key = input('> ')
    file = open('master.gco', 'w')
    file.write(master_key)
    file.close()

print("Welcome! Please enter your master key to continue:")
check_key = input('> ')

quit_program = False
while not quit_program:
    if check_key == master_key and quit_program == False:
        print(f'''What would you like to do?

                View - view saved logins
                Add - add a new login
                Quit - exit program
                ''')
        while True:
            mode = input('> ').lower()
            if mode == 'view':
                saved_logins = view()
                print(saved_logins)
            elif mode == 'add':
                user_name = input('Username: ')
                user_password = input('Password: ')
                add(user_name, user_password)
            elif mode =='quit':
                quit_program = True
                break
            else:
                print(f'The command {mode} is not recognized')
                continue
    elif check_key == master_key and quit_program == True:
        break
    else:
        print(f'Sorry, but the password {check_password} is invalid, please try again!')

#end of app.py