The save method of FuncAnimation appears to run twice, the second time in a different thread. I discovered upon trying to give the user feedback on the process. Here is a slight reworking of one of ...

Summary: matplotlib 1.5 only saving 1 frame of animation, 1.4.3 saves all frames I have code that reads like this (link to full code below): anim = animation.FuncAnimation(fig, bar_animate, frames= ...