CODEWITHSUNDEEP
pythondjangomatplotlib
Karnivaurus
Karnivaurus

Reputation: 24121

Django and Matplotlib: signal only works in main thread

In views.py of my Django project, at a certain point in the code, I want to display a graph plot on the server to visualise in real-time the user input. So, I created another file plotter.py in the same folder as views.py, with the following content to display a simple graph:

import numpy import matplotlib.pyplot

def plot():
    N = 50
    x = numpy.random.rand(N)
    y = numpy.random.rand(N)
    colors = numpy.random.rand(N)
    area = numpy.pi * (15 * numpy.random.rand(N))**2
    matplotlib.pyplot.scatter(x, y, s=area, c=colors, alpha=0.5)
    matplotlib.pyplot.show()

Then, in views.py, I import plotter, and then at my desired point in the file, I have plotter.plot(). However, this gives the following error:

Request Method:     POST
Request URL:    http://localhost:8000/teacher/
Django Version:     1.7
Exception Type:     ValueError
Exception Value:    

signal only works in main thread

Exception Location:     C:\Anaconda\lib\site-packages\matplotlib\backends\backend_qt5.py in mainloop, line 150
Python Executable:  C:\Anaconda\python.exe
Python Version:     2.7.8

How can I achieve this without causing such an error?

Upvotes: 2

Views: 3668

Answers (1)

abhi
abhi

Reputation: 366

run your server as follows

python manage.py runserver --nothreading --noreload

Upvotes: 7

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