使用 matplotlib 时 Emacs 中的 Python shell 冻结 [英] Python shell in Emacs freezes when using matplotlib

问题描述

我之前认为这是 IPython 的问题，但今天我再次测试，这是我所做的:

1. 在cmd窗口中运行emacs -Q
2. 打开一个 .py 文件
3. M-x，然后运行python-shell-switch-to-shell、RET和RET.然后我准备好了 Python shell
4. 然后我输入以下代码:

<块引用>

Python 2.7.3(默认，2012 年 4 月 10 日，23:31:26)[MSC v.1500 32 位(英特尔)] on win32输入帮助"、版权"、信用"或许可证"以获取更多信息.>>>导入 matplotlib.pyplot 作为 plt>>>plt.ion()>>>plt.plot([1,2,3])[]>>>

实际上在这之后，没有任何图形出现，并且外壳被冻结，例如，当我输入时:

<块引用><预><代码>>>>打印(你好")

什么也没发生...我没有测试过其他绘图工具，但 matplotlib.不知道是不是bug我已经在这里和谷歌搜索了一段时间，但没有运气.我的系统是:Emacs 24.3 32 位 for Windows，在 Windows 7 下.如果其他人可以复制与这里相同的问题，我会将其报告为错误.

我使用 IPython 作为 Python shell:

C:/Python27/python.exe -i C:/Python27/Scripts/ipython-script.py --pylab

然后，我输入figure();plot([1,2,3])，正如预期的那样，图形弹出并冻结.然后我做了:运行 comint-send-eof 的 C-c C-d，这个数字实际上得到了更新！但是我的 IPython shell 会话也被终止并显示以下消息:

在 [6] 中:你真的要退出 ([y]/n) 吗?回溯(最近一次调用最后一次):文件C:/Python27/Scripts/ipython-script.py"，第 9 行，在 <module>load_entry_point('ipython==0.13.1', 'console_scripts', 'ipython')()系统退出如果您怀疑这是 IPython 错误，请在以下位置报告:https://github.com/ipython/ipython/issues或发送电子邮件至 [e-mail] 的邮件列表您现在可以使用%tb"打印更详细的回溯，或使用%debug"以交互方式调试它.可以通过以下方式启用用于错误报告目的的额外详细回溯:%config Application.verbose_crash=True

这里有什么有用的线索吗?！

解决方案

一种解决方案是:

(setq python-shell-interpreter "C:\YourPython3Dist\python.exe"python-shell-interpreter-args "-i C:\YourPython3Dist\Scripts\ipython3-script.py console --pylab=qt")

ipython-script.py调用中的参数console很重要！

在带有 qt 后端的 Python 3 中，它对我有用.我不知道它如何与 py 2.7 一起使用.(如果 ipytho-script.py 支持这些参数，应该没问题)

I previously thought that was the issue with IPython, but today I tested again, here is what I did:

1. Run emacs -Q in cmd window
2. Open a .py file
3. M-x, then run python-shell-switch-to-shell, RET, and RET. Then I have the Python shell ready
4. I in put the following code then:

Python 2.7.3 (default, Apr 10 2012, 23:31:26) [MSC v.1500 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import matplotlib.pyplot as plt
>>> plt.ion()
>>> plt.plot([1,2,3])
[<matplotlib.lines.Line2D object at 0x03068610>]
>>>

Actually after this, no figure shows up, and the shell is frozen, e.g., when I input:

>>> print("hello")

nothing happened...I haven't tested other plotting tools but matplotlib. I don't know if it is a bug. I've searched for a while, here and though Google, but no luck. My system is: Emacs 24.3 32 bit for Windows, under Windows 7. If others can duplicate same issue as here, I will report this as a bug.

I used IPython as the Python shell by:

C:/Python27/python.exe -i C:/Python27/Scripts/ipython-script.py --pylab

Then, I input figure(); plot([1,2,3]), as expected, the figure popup and freezes. Then I did: C-c C-d which runs comint-send-eof, and the figure actually get updated! But my IPython shell session is also terminated with the following message:

In [6]:
Do you really want to exit ([y]/n)?
Traceback (most recent call last):
File "C:/Python27/Scripts/ipython-script.py", line 9, in <module>
load_entry_point('ipython==0.13.1', 'console_scripts', 'ipython')()
SystemExit

If you suspect this is an IPython bug, please report it at:
https://github.com/ipython/ipython/issues
or send an email to the mailing list at [e-mail]

You can print a more detailed traceback right now with "%tb", or use "%debug"
to interactively debug it.

Extra-detailed tracebacks for bug-reporting purposes can be enabled via:
%config Application.verbose_crash=True

Any helpful clue here?!

解决方案

one solution is:

(setq python-shell-interpreter "C:\YourPython3Dist\python.exe"
      python-shell-interpreter-args "-i C:\YourPython3Dist\Scripts\ipython3-script.py console --pylab=qt")

The Argument console in the call of ipython-script.py is the important one!

In Python 3 with qt backend it works for me. I don't know how it works with py 2.7. (should be no problem if these arguments are supported for ipytho-script.py)

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