Question

我为Windows 7安装了Anaconda 3（64位）Python 3.4，并尝试从Matplotlib测试样本。但是当我运行脚本时，它出现了这样的异常：

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

代码来自here，未经修改的示例：

#!/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()

似乎tkagg.blit无法获得正确的渲染器，因此它引发了异常。我无法找到self.renderer._renderer所指的位置。然后我从spyderlib问题1831中找到了一个类似的问题：https://code.google.com/p/spyderlib/issues/detail?id=1831。

我猜这是Spyder之间Python 3.4的问题，所以我为Windows 7安装了Anaconda（32位）Python 2.7，并尝试在另一个Windows 7系统中运行上面的示例脚本。然后tkinter GUI正常显示matplotlib图，没有例外。所以我想知道这可能是Spyder版本的问题。我们的项目基于Python 3.4，我们不想回到Python 2.7，因为迁移很复杂。我该如何解决这个问题？

Answer 1

这是Anaconda tk Matplotlib后端的一个错误，据我所知它只会影响Windows用户。

我让Continuum的人知道它，但不幸的是他们告诉我这是他们的低优先级之一，因为很少有人使用tk后端。

Matplotlib backend_tkagg TclError

1 个答案: