我想在Python下同时运行多个重复任务。虽然我对多进程编程还不是很熟悉,但由于所有的任务都是独立的,所以我使用了以下简单的代码:
import numpy as np
import sys
import os
import glob
import matplotlib.pyplot as plt
import concurrent.futures as Cfut
def analize(simul, N_thread):
path = os.getcwd()
print('Analizing topo ...')
Data = output of some calculations
print('Writing Data ...')
np.save('Data', Data)
print('Data saved')
print('Printing figures')
plt.figure()
plt.plot(Data[0])
plt.savefig('figure1.pdf')
plt.clf()
plt.plot(Data[0])
plt.savefig('figure1.pdf')
plt.close('all')
print('figures saved')
os.chdir(path
if __name__ == '__main__':
list_simul = sorted(glob.glob('Layer*'))
executor = Cfut.ProcessPoolExecutor(5)
#executor = Cfut.ThreadPoolExecutor(N_jobs)
futures = [executor.submit(analize, item, 10) for item in list_simul]
Cfut.wait(futures)
它在3个月里运行得非常好,但自从今天早上开始,有时会出现以下错误:
Exception ignored in: <bound method Image.__del__ of <tkinter.PhotoImage object at 0x7fac6c187f98>>
Traceback (most recent call last):
File "/usr/lib/python3.5/tkinter/__init__.py", line 3359, in __del__
self.tk.call('image', 'delete', self.name)
RuntimeError: main thread is not in main loop
奇怪的是,有些工作可以顺利完成,而且不是每次都会出现问题。经过一番研究,我找到了许多与此问题有关的帖子,它们都与图形用户界面有关。我理解了这个问题,但我想我应该能够找到一个解决方法,因为我没有显示任何图像,只是创建并保存对象,并且所有任务都是独立的。
有什么提示吗?