I am not trying to thread any processes, but keep running into this error all over my Django site. I have seen a few other people ask this question but they are all attempting to use multiple threads.
This is on Django 1.11, Python 3.6, Matplotlib 2.0.0. I also will note that this issue occurs on my mac, but not on my live Heroku server.
I am using Pyplot to create some visualizations of models instances the users make, and get this about half the time I try to run it:
Exception Type: RuntimeError
Exception Value: main thread is not in main loop
The last line of my code that runs is simply the plt.figure() call
Trace:
File "/Users/Mark/Desktop/Professional/FSC/water/WATER/hydrograph/views.py" in processData
397. hydroFigure = plt.figure()
File "/Users/Mark/Desktop/Professional/FSC/water/WATER/ENV/lib/python3.6/site- packages/matplotlib/pyplot.py" in figure
535. **kwargs)
File "/Users/Mark/Desktop/Professional/FSC/water/WATER/ENV/lib/python3.6/site-packages/matplotlib/backends/backend_tkagg.py" in new_figure_manager
81. return new_figure_manager_given_figure(num, figure)
File "/Users/Mark/Desktop/Professional/FSC/water/WATER/ENV/lib/python3.6/site-packages/matplotlib/backends/backend_tkagg.py" in new_figure_manager_given_figure
98. icon_img = Tk.PhotoImage(file=icon_fname)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/tkinter/__init__.py" in __init__
3539. Image.__init__(self, 'photo', name, cnf, master, **kw)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/tkinter/__init__.py" in __init__
3495. self.tk.call(('image', 'create', imgtype, name,) + options)
Exception Type: RuntimeError at /hydrograph/
Exception Value: main thread is not in main loop
Any ideas on what I can do?