Question

我最近按照说明安装了ipython：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, baseName, className, interactive, wantobjects, useTk, sync, use)
   1686         if useTk:
   1687             self._loadtk()

TclError: no display name and no $DISPLAY environment variable

Answer 1

在cygwin终端中键入startxwin（您将需要cygwin setup.exe中提供的X11库）然后，您可以从新的终端窗口运行ipython --pylab和{{1}之类的命令这将打开一个新窗口，但你需要调用plot(range(10))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安装文件，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并且我相信X11-devel库是必要的）。

通过ez_setup.py获取setuptools

plt.draw()

关于cygwin的ipython --pylab：TclError：没有显示名称，没有$ DISPLAY环境变量

1 个答案: