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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_password(from_stdin_only=False):
 """ Get a password either from STDIN or by prompting the user. :return: the password. """

    if not sys.stdin.isatty():
        password = sys.stdin.readline().strip()
    elif not from_stdin_only:
        password = getpass.getpass('Enter the password: ')
    else:
        password = None

    return password