[FIXED] Matplotlib giving error "OverflowError: In draw_path: Exceeded cell block limit"

Issue

I'm trying to render an image using matplotlib with 100000000 data points and it produces the error OverflowError: In draw_path: Exceeded cell block limit. Is there a limit in the amount of data points it can draw?

Solution

The problem is a hardcoded limit in the number of points in the backend Agg.

Try using:

import matplotlib as mpl
mpl.rcParams['agg.path.chunksize'] = 10000

or other large value.

You can find the issue and the solution proposed here: https://github.com/matplotlib/matplotlib/issues/5907

Answered By - Serenity