我正在用Python编写一个程序,使用matplotlib来运行动画,其中包括数值解时间依赖的薛定谔方程。一切正常,但是一旦动画运行完毕,我希望窗口能够自动关闭。我的方法(如下所示)可以实现,但会抛出无法捕获的异常。虽然对于我需要做的事情来说它可以正常工作,但错误看起来非常混乱。
我有一种替代方法,可以在不抛出错误的情况下工作,但需要用户手动关闭窗口(这对我的目的是不可接受的)。请问有人能指出我哪里做错了,或者建议更好的选择吗?
以下是我的代码的相关部分简化版:
无论我尝试什么,第一部分TclError总是存在。
我有一种替代方法,可以在不抛出错误的情况下工作,但需要用户手动关闭窗口(这对我的目的是不可接受的)。请问有人能指出我哪里做错了,或者建议更好的选择吗?
以下是我的代码的相关部分简化版:
from matplotlib import animation as ani
from matplotlib import pyplot as plt
multiplier = 0
def get_data(): # some dummy data to animate
x = range(-10, 11)
global multiplier
y = [multiplier * i for i in x]
multiplier += 0.005
return x, y
class Schrodinger_Solver(object):
def __init__(self, xlim = (-10, 10), ylim = (-10, 10), num_frames = 200):
self.num_frames = num_frames
self.fig = plt.figure()
self.ax = self.fig.add_subplot(111, xlim = xlim, ylim = ylim)
self.p_line, = self.ax.plot([], [])
self.ani = ani.FuncAnimation(self.fig, self.animate_frame,
init_func = self.init_func,
interval = 1, frames = self.num_frames,
repeat = False, blit = True)
plt.show()
def animate_frame(self, framenum):
data = get_data()
self.p_line.set_data(data[0], data[1])
if framenum == self.num_frames - 1:
plt.close()
# closes the window when the last frame is reached,
# but exception is thrown. Comment out to avoid the error,
# but then the window needs manual closing
return self.p_line,
def init_func(self):
self.p_line.set_data([], [])
return self.p_line,
Schrodinger_Solver()
我正在运行Python 2.7.2和matplotlib 1.1.0,使用的操作系统是Windows 7。
非常感谢您的帮助。
编辑: 以下是异常和跟踪信息:
Exception in Tkinter callback
Traceback (most recent call last):
File "C:\Python27\lib\lib-tk\Tkinter.py", line 1410, in __call__
return self.func(*args)
File "C:\Python27\lib\lib-tk\Tkinter.py", line 495, in callit
func(*args)
File "C:\Python27\lib\site-packages\matplotlib\backends\backend_tkagg.py", line 116, in _on_timer
TimerBase._on_timer(self)
File "C:\Python27\lib\site-packages\matplotlib\backend_bases.py", line 1092, in _on_timer
ret = func(*args, **kwargs)
File "C:\Python27\lib\site-packages\matplotlib\animation.py", line 315, in _step
still_going = Animation._step(self, *args)
File "C:\Python27\lib\site-packages\matplotlib\animation.py", line 177, in _step
self._draw_next_frame(framedata, self._blit)
File "C:\Python27\lib\site-packages\matplotlib\animation.py", line 197, in _draw_next_frame
self._post_draw(framedata, blit)
File "C:\Python27\lib\site-packages\matplotlib\animation.py", line 220, in _post_draw
self._blit_draw(self._drawn_artists, self._blit_cache)
File "C:\Python27\lib\site-packages\matplotlib\animation.py", line 240, in _blit_draw
ax.figure.canvas.blit(ax.bbox)
File "C:\Python27\lib\site-packages\matplotlib\backends\backend_tkagg.py", line 244, in blit
tkagg.blit(self._tkphoto, self.renderer._renderer, bbox=bbox, colormode=2)
File "C:\Python27\lib\site-packages\matplotlib\backends\tkagg.py", line 19, in blit
tk.call("PyAggImagePhoto", photoimage, id(aggimage), colormode, id(bbox_array))
TclError: this isn't a Tk application
Traceback (most recent call last):
File "C:\Python27\quicktest.py", line 44, in <module>
Schrodinger_Solver()
File "C:\Python27\quicktest.py", line 26, in __init__
plt.show()
File "C:\Python27\lib\site-packages\matplotlib\pyplot.py", line 139, in show
_show(*args, **kw)
File "C:\Python27\lib\site-packages\matplotlib\backend_bases.py", line 109, in __call__
self.mainloop()
File "C:\Python27\lib\site-packages\matplotlib\backends\backend_tkagg.py", line 69, in mainloop
Tk.mainloop()
File "C:\Python27\lib\lib-tk\Tkinter.py", line 325, in mainloop
_default_root.tk.mainloop(n)
AttributeError: 'NoneType' object has no attribute 'tk'
我可以通过小的修改来捕获第二个异常AttributeError:
try: plt.show()
except AttributeError: pass
无论我尝试什么,第一部分TclError总是存在。