如何暂停pylab图形直到按下键或单击鼠标?

I am trying to program an animated simulation using pylab and networkx. The simulation is not interesting all the time so most of the time I want it to go fast, however, I want to be able to pause it and look at it when it looks interesting. Pausing the screen until keypress will solve my problem, because I can press the key as fast/slow as I want.I am trying to program an animated simulation u