Matplotlib backend_tkagg Tcl错误

Question

我在Windows 7上安装了Anaconda 3（64位）和Python 3.4，然后想测试一下Matplotlib的示例。但是当我运行这个脚本时，出现了一个异常，像这样：

Traceback (most recent call last):

  File "<ipython-input-7-7482c0850da6>", line 1, in <module>
    runfile('E:/Kanbox/Python/HWV/test/matplotlib_test.py', wdir='E:/Kanbox/Python/HWV/test')

  File "C:\Anaconda3\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 585, in runfile
    execfile(filename, namespace)

  File "C:\Anaconda3\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 48, in execfile
    exec(compile(open(filename, 'rb').read(), filename, 'exec'), namespace)

  File "E:/Kanbox/Python/HWV/test/matplotlib_test.py", line 36, in <module>
    canvas.show()

  File "C:\Anaconda3\lib\site-packages\matplotlib\backends\backend_tkagg.py", line 349, in draw
    tkagg.blit(self._tkphoto, self.renderer._renderer, colormode=2)

  File "C:\Anaconda3\lib\site-packages\matplotlib\backends\tkagg.py", line 20, in blit
    tk.call("PyAggImagePhoto", photoimage, id(aggimage), colormode, id(bbox_array))

TclError

这段代码来自这里，是没有修改过的示例：

#!/usr/bin/env python
import matplotlib
matplotlib.use('TkAgg')

from numpy import arange, sin, pi
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2TkAgg
from matplotlib.figure import Figure

import sys
if sys.version_info[0] < 3:
    import Tkinter as Tk
else:
    import tkinter as Tk

def destroy(e): sys.exit()

root = Tk.Tk()
root.wm_title("Embedding in TK")
root.bind("<Destroy>", destroy)


f = Figure(figsize=(5,4), dpi=100)
a = f.add_subplot(111)
t = arange(0.0, 3.0, 0.01)
s = sin(2*pi*t)

a.plot(t,s)
a.set_title('Tk embedding')
a.set_xlabel('X axis label')
a.set_ylabel('Y label')



# A tk.DrawingArea
canvas = FigureCanvasTkAgg(f, master=root)
canvas.show()
canvas.get_tk_widget().pack(side=Tk.TOP, fill=Tk.BOTH, expand=1)

#toolbar = NavigationToolbar2TkAgg(canvas, root)
#toolbar.update()
canvas._tkcanvas.pack(side=Tk.TOP, fill=Tk.BOTH, expand=1)

button = Tk.Button(master=root, text='Quit', command=sys.exit)
button.pack(side=Tk.BOTTOM)

Tk.mainloop()

看起来tkagg.blit无法找到正确的渲染器，所以抛出了一个异常。我也找不到self.renderer._renderer指的是什么。后来我发现了一个类似的问题，来自spyderlib的第1831号问题：https://code.google.com/p/spyderlib/issues/detail?id=1831。

我猜这可能是Python 3.4和Spyder之间的问题，所以我在另一个Windows 7系统上安装了Anaconda（32位）和Python 2.7，然后尝试运行上面的示例脚本。结果tkinter的图形界面正常显示了一个matplotlib图形，也没有出现异常。所以我在想，可能真的是Spyder版本的问题。我们的项目是基于Python 3.4的，我们不想回到Python 2.7，因为迁移起来很麻烦。我该怎么解决这个问题呢？

tkinter matplotlib Anaconda exception handling spyder graphics windows 7 rendering

Matplotlib backend_tkagg Tcl错误

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