emacs中的python shell在使用matplotlib时会冻结 [英] python shell in emacs freezes when using matplotlib

问题描述

我以前认为这是ipython的问题，但是今天我再次测试了，这是我做的：

1. run emacs -Q 在cmd窗口


2. 打开一个.py文件


3. Mx ，然后运行 python-shell-switch-to-shell ， RET code> RET ，那么我有python shell准备好了


4. 我把以下代码，然后：

  Python 2.7.3（默认，2012年4月10日，23:31:26）[MSC v.1500 32位（Intel）] on win32 
输入help，copyright，credits或license了解更多信息。 
>>> import matplotlib.pyplot as plt 
>>>> plt.ion（）
>>>> plt.plot（[1,2,3]）
 [< matplotlib.lines.Line2D object at 0x03068610>] 
>>> 
  

其实没有显示，shell是冻结，例如，当我输入：

 >>> print（hello）
  

没有发生什么...我避风港没有测试其他绘图工具，但matplotlib。我不知道是否是一个错误，我搜索了一段时间，这里，虽然谷歌，但没有运气。我的系统是：Emacs 24.3 32位Windows，在Windows 7下。如果其他人可以重复同样的问题，我会报告这是一个错误

谢谢！ p>

更新：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（）;情节（[1,2,3]），如预期的那样，数字弹出并冻结，然后我做了： Cc Cd 它运行 comint-send-eof ，该图实际上得到更新 !,但是我的ipython shell会话也被终止了以下msg：

 在[6]中：
你真的要退出（[y] / n）吗？ 
追溯（最近的最后一次调用）：
文件C：/Python27/Scripts/ipython-script.py，第9行在< module> 
 load_entry_point（'ipython == 0.13.1'，'console_scripts'，'ipython'）（）
 SystemExit 
 
如果您怀疑这是一个IPython错误，请报告在
 https://github.com/ipython/ipython/issues 
或发送电子邮件到邮件列表[e-mail] 
 
您可以打印使用％tb进行更详细的追溯，或使用％debug
进行交互式调试。 
 
可通过以下方式启用针对错误报告目的的详细追溯：
％config Application.verbose_crash = True 
  

这里有任何有用的线索？

解决方案

一个解决方案是：

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

ipython-script.py的调用中的参数控制台是重要的！ / strong>

在带有qt后端的Python 3中，它适用于我。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，则应该没有问题）

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, RET, then i have the python shell ready
4. i 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

thanks!

update: 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, the figure actually get updated!, but my ipython shell session is also terminated with the following msg:

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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