from random import randint

class Account:
    def __init__(self, email, passw):
        self.email = email
        self.passw = passw


class AccountLoader:
    def __init__(self):
        self.accounts = []

    @staticmethod
    def parse_line_to_account(line):
        _line = line.split(':')
        return _line[0], _line[1]

    def load_accounts_from_file(self):
        _accounts_list = [line.strip() for line in open('accounts.txt')]
        for _account in _accounts_list:
            self.accounts.append(Account(*self.parse_line_to_account(_account)))

    def get_random_account(self):
        r = randint(0, len(self.accounts))
        return self.accounts[r-1]

al = AccountLoader()
al.load_accounts_from_file()

#Example
for i in range(1,10):
    #10 razy randomowe konto chcemy
    random_account = al.get_random_account()
    print(random_account.email, random_account.passw)
    #przykładowo
    #element.send_keys(random_account.email)