退出包装器时，Python会诅咒TypeError [英] Python curses TypeError when exiting wrapper

问题描述

我正在运行Mac OS X 10.9.5，并用curses.wrapper包装我的main()函数时，我的程序成功退出后出现以下错误:

I'm running Mac OS X 10.9.5 and when wrapping my main() function with curses.wrapper I'm getting the following error after my program exits successfully:

Traceback (most recent call last):
  File "test.py", line 42, in <module>
     wrapper(main(SCREEN))
  File     "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/curses/__init__.py", line 94, in wrapper
    return func(stdscr, *args, **kwds)
TypeError: 'NoneType' object is not callable

一些放大代码:

if __name__ == "__main__":
    # Initialize screen
    SCREEN = curses.initscr()

    # Run program with wrapper in case it fails
    wrapper(main(SCREEN))

    # Terminal cleanup
    curses.nocbreak()
    SCREEN.keypad(False)
    curses.echo()

如果我使用CTRL + C尝试在程序运行时退出该程序，则会显示异常，但终端仍处于混乱状态(包装器不起作用).我在这里想念一个明显的东西吗?

If I use CTRL + C to attempt to exit the program while it's running, the exception is shown but the terminal remains in a disarrayed state (wrapper doesn't do it's job). Am I missing an something obvious here?

• 编辑*

我确认在通过远程SSH终端会话的Ubuntu 14.10服务器版本上也会发生这种情况.

I confirmed this also happens on Ubuntu 14.10 server edition over a remote SSH terminal session.

推荐答案

据我所知，您错误地调用了curses.wrapper函数. 从文档:

As far as I can see, you're calling the curses.wrapper function wrongly. From the documentation:

curses.wrapper(func, ...)初始化curses并调用另一个可调用对象func，该对象应该是使用curses的应用程序的其余部分. (...)然后将可调用对象func传递给主窗口"stdscr"作为其第一个参数，然后再传递给wrapper()的任何其他参数.

curses.wrapper(func, ...) Initialize curses and call another callable object, func, which should be the rest of your curses-using application. (...) The callable object func is then passed the main window ‘stdscr’ as its first argument, followed by any other arguments passed to wrapper().

在您的示例中，它应如下所示:

In your example, it should look like this:

def main(SCREEN):
    ... # My program code

if __name__ == "__main__": 
    # The function main gets the stdscr passed by curses itself
    wrapper(main)

如果您需要在主通话之前访问stdscr

在那种情况下，我不会使用包装器，而是使用 curses.endwin ()以取消初始化curses库. 未经测试的示例:

If you need to access to stdscr before the main call

I would not use wrapper in that case, but use curses.endwin() to deinitialize the curses library. Untested example:

SCREEN = curses.initscr()
# Modify your curses settings here

try:
    main(SCREEN)
except: # End curses session before raising the error
    curses.endwin()
    raise
else: # End curses session if program terminates normally
    curses.endwin()

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