python_manager.py

from cryptography.fernet import Fernet

'''
def write_key():
    key = Fernet.generate_key()
    with open('key.key', 'wb') as key_file:
        key_file.write(key)
'''


def load_key():
    file = open('key.key', 'rb')
    key = file.read()
    file.close()
    return key


master_pwd = input('What is the master password? ')
key = load_key() + master_pwd.encode()
fer = Fernet(key)


def view():
    with open('password.txt', 'r') as f:
        for line in f.readlines():
            data = line.rstrip()
            user, passw = data.split('|')
            print('user:', user, '| password:', fer.decrypt(passw.encode()).decode())


def add():
    name = input('Account name: ')
    pwd = input('Password: ')

    with open('password.txt', 'a') as f:
        f.write(name + '|' + fer.encrypt(pwd.encode()).decode() + '\n')


while True:
    mode = input('Would you like to add a new password or view existing one (view/add) ')
    if mode == 'q':
        break

    if mode == 'view':
        view()
    elif mode == 'add':
        add()
    else:
        print('Invalid mode')
        continue