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windows - 为什么 IPython 显示多个字符？

问题描述

我刚刚为 Windows 安装了 IPython，但这一直在发生：

Python 3.8.3 (tags/v3.8.3:6f8c832, May 13 2020, 22:20:19) [MSC v.1925 32 bit (Intel)]
Type 'copyright', 'credits' or 'license' for more information
IPython 7.16.1 -- An enhanced Interactive Python. Type '?' for help.

In [1]: i = 11

In [2]: iiii
Out[2]: 1

In [3]: iiiiii
Out[3]: 1

In [4]: iiiiiiii
Out[4]: 1

In [5]: Press ENTER to continue...                                                                                                                                                                          
Unhandled exception in event loop:
  File "c:\users\<username>\appdata\local\programs\python\python38-32\lib\asyncio\proactor_events.py", line 768, in _loop_self_reading
    f.result()  # may raise
  File "c:\users\<username>\appdata\local\programs\python\python38-32\lib\asyncio\windows_events.py", line 808, in _poll
    value = callback(transferred, key, ov)
  File "c:\users\<username>\appdata\local\programs\python\python38-32\lib\asyncio\windows_events.py", line 457, in finish_recv
    raise ConnectionResetError(*exc.args)

Exception [WinError 995] The I/O operation has been aborted because of either a thread exit or an application request
Press ENTER to continue...

对于In [2],In [3]和In [4], 我只按i了一次。在我按下 ENTER 后，它们的长度也增加了。
错误随机发生，但效果纯图形化，否则效果很好。

另外，当我按退格键时会发生这种情况：

In [1]: a = "bc|cb" = a

（后按退格键|）

我已经重新安装了 Python，这又发生了。
我使用 pip 安装了 IPython，使用了适用于 Windows 的 IPython 网站上的说明

更令人困惑的是，我的 python shell 安装了 ipython 自动完成功能。
但是，如果我在没有任何东西可以自动完成时按 Tab，则会发生这种情况：

Python 3.8.3 (tags/v3.8.3:6f8c832, May 13 2020, 22:20:19) [MSC v.1925 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> Readline internal error
Traceback (most recent call last):
  File "C:\Users\<username>\AppData\Local\Programs\Python\Python38-32\lib\site-packages\pyreadline\console\console.py", line 768, in hook_wrapper_23
    res = ensure_str(readline_hook(prompt))
  File "C:\Users\<username>\AppData\Local\Programs\Python\Python38-32\lib\site-packages\pyreadline\rlmain.py", line 571, in readline
    self._readline_from_keyboard()
  File "C:\Users\<username>\AppData\Local\Programs\Python\Python38-32\lib\site-packages\pyreadline\rlmain.py", line 536, in _readline_from_keyboard
    if self._readline_from_keyboard_poll():
  File "C:\Users\<username>\AppData\Local\Programs\Python\Python38-32\lib\site-packages\pyreadline\rlmain.py", line 556, in _readline_from_keyboard_poll
    result = self.mode.process_keyevent(event.keyinfo)
  File "C:\Users\<username>\AppData\Local\Programs\Python\Python38-32\lib\site-packages\pyreadline\modes\emacs.py", line 243, in process_keyevent
    r = self.process_keyevent_queue[-1](keyinfo)
  File "C:\Users\<username>\AppData\Local\Programs\Python\Python38-32\lib\site-packages\pyreadline\modes\emacs.py", line 286, in _process_keyevent
    r = dispatch_func(keyinfo)
  File "C:\Users\<username>\AppData\Local\Programs\Python\Python38-32\lib\site-packages\pyreadline\modes\basemode.py", line 257, in complete
    completions = self._get_completions()
  File "C:\Users\<username>\AppData\Local\Programs\Python\Python38-32\lib\site-packages\pyreadline\modes\basemode.py", line 200, in _get_completions
    r = self.completer(ensure_unicode(text), i)
  File "C:\Users\<username>\AppData\Local\Programs\Python\Python38-32\lib\rlcompleter.py", line 80, in complete
    readline.redisplay()
AttributeError: module 'readline' has no attribute 'redisplay'

标签： windowsipython

解决方案

我在 PowerShell (5.1.18362.1171) 和命令提示符中对 ipython 7.19.0 和 Python 3.9.0 有同样的问题。这也很奇怪，当我按下删除时，最后输入的字符出现在命令行上。我仍在寻找解释和修复，同时我使用 Jupyter QtConsole 工作正常

jupyter qtconsole

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