## 8.7.1 Example

Here's a function that prompts for a password with echoing turned off. Note the technique using a separate `tcgetattr()` call and a `try` ... `finally` statement to ensure that the old tty attributes are restored exactly no matter what happens:

      def getpass(prompt = "Password: "):
          import termios, TERMIOS, sys
          fd = sys.stdin.fileno()
          old = termios.tcgetattr(fd)
          new = termios.tcgetattr(fd)
          new[3] = new[3] & ~TERMIOS.ECHO          # lflags
          try:
              termios.tcsetattr(fd, TERMIOS.TCSADRAIN, new)
              passwd = raw_input(prompt)
          finally:
              termios.tcsetattr(fd, TERMIOS.TCSADRAIN, old)
          return passwd