matplotlib – 关于cygwin的ipython –pylab：TclError：没有显

发布时间：2020-12-20 13:33:43 所属栏目：Python 来源：网络整理

导读：我最近按照说明安装了i python： http://ardiyu07.blogspot.com/2012/04/ipython-012-installation-in-cygwin.html. 当我运行’ipython –pylab’时,我收到以下错误消息.我已经google了一下,发现有关此错误的帖子,但在不同的背景下.当我使用–pylab参数启动i

我最近按照说明安装了i python： http://ardiyu07.blogspot.com/2012/04/ipython-012-installation-in-cygwin.html.

当我运行’ipython –pylab’时,我收到以下错误消息.我已经google了一下,发现有关此错误的帖子,但在不同的背景下.当我使用–pylab参数启动ipython时会出现.我知道这与matplotlib gui交互有关,但不确定究竟是什么.我很欣赏这个指导.

$ipython --pylab
Python 2.7.3 (default,Dec 18 2012,13:50:09)
Type "copyright","credits" or "license" for more information.

IPython 0.13.1 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object',use 'object??' for extra details.

Welcome to pylab,a matplotlib-based Python environment [backend: TkAgg].
For more information,type 'help(pylab)'.
[TerminalIPythonApp] GUI event loop or pylab initialization failed
---------------------------------------------------------------------------
TclError                                  Traceback (most recent call last)
/usr/lib/python2.7/site-packages/IPython/core/interactiveshell.pyc in enable_pylab(self,gui,import_all)
   2780         # Now we must activate the gui pylab wants to use,and fix %run to take
   2781         # plot updates into account
-> 2782         self.enable_gui(gui)
   2783         self.magics_manager.registry['ExecutionMagics'].default_runner = 
   2784         mpl_runner(self.safe_execfile)

/usr/lib/python2.7/site-packages/IPython/lib/inputhook.pyc in enable_gui(gui,app)
    526         e = "Invalid GUI request %r,valid ones are:%s" % (gui,guis.keys())
    527         raise ValueError(e)
--> 528     return gui_hook(app)
    529

/usr/lib/python2.7/site-packages/IPython/lib/inputhook.pyc in enable_tk(self,app)
    322         if app is None:
    323             import Tkinter
--> 324             app = Tkinter.Tk()
    325             app.withdraw()
    326             self._apps[GUI_TK] = app

/usr/lib/python2.7/lib-tk/Tkinter.pyc in __init__(self,screenName,baseName,className,useTk,sync,use)
   1683                 baseName = baseName + ext
   1684         interactive = 0
-> 1685         self.tk = _tkinter.create(screenName,interactive,wantobjects,use)
   1686         if useTk:
   1687             self._loadtk()

TclError: no display name and no $DISPLAY environment variable

解决方法

在cygwin终端输入startxwin(你需要从cygwin setup.exe获得X11库)然后你可以从新的终端窗口运行ipython –pylab和一个命令,如plot(range(10)),这将打开一个新的窗口,但你需要调用plt.draw()来显示与原生pylab不同的绘图,与原生pylab相比,对cygwin中的绘图窗口的控制也很差.

我不需要在此过程中编辑任何设置文件,您可能需要’pip uninstall matplotlib’并重新安装,直到您通过cygwin setup.exe安装了所需的库(tkinter,我相信需要X11-devel库) .

通过ez_setup.py获取setuptools

wget http://peak.telecommunity.com/dist/ez_setup.py
python ez_setup.py
easy_install pip 
pip install numpy 
pip install ipython
pip install matplotlib

（编辑：李大同）

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