我是Python新手。我使用Django编写Web服务来保存服务器中的图像。我试图使用下面的代码将绘图保存为图像，并且在Python抛出错误之后它可以正常工作3次。如何解决这个问题？
Exception ignored in: <bound method Image.__del__ of <tkinter.PhotoImage object at 0x000000000FE40048>>
Traceback (most recent call last):
File "c:\dev\lib\tkinter\__init__.py", line 3504, in __del__
self.tk.call('image', 'delete', self.name)
RuntimeError: main thread is not in main loop
Exception ignored in: <bound method Image.__del__ of <tkinter.PhotoImage object at 0x0000000010996438>>
Traceback (most recent call last):
File "c:\dev\lib\tkinter\__init__.py", line 3504, in __del__
self.tk.call('image', 'delete', self.name)
RuntimeError: main thread is not in main loop
Exception ignored in: <bound method Image.__del__ of <tkinter.PhotoImage object at 0x0000000010B8BF98>>
Traceback (most recent call last):
File "c:\dev\lib\tkinter\__init__.py", line 3504, in __del__
self.tk.call('image', 'delete', self.name)
RuntimeError: main thread is not in main loop
Tcl_AsyncDelete: async handler deleted by the wrong thread
**PYTHON CODE**
fileName = id_generator()+".png"
filePath = settings.MEDIA_ROOT+"/"+fileName
fig.savefig(filePath, dpi=fig.dpi)
plt.close(fig)
Response(fileName, status=status.HTTP_201_CREATED)
Package Version
------------------- ---------
cassandra-driver 3.14.0
certifi 2018.4.16
cycler 0.10.0
Django 2.0.5
djangorestframework 3.8.2
kiwisolver 1.0.1
matplotlib 2.2.2
numpy 1.14.4
pandas 0.23.0
pip 10.0.1
pyparsing 2.2.0
python-dateutil 2.7.3
pytz 2018.4
scikit-learn 0.19.1
scipy 1.1.0
setuptools 39.2.0
six 1.11.0
wheel 0.31.1
wincertstore 0.2