如何强制Y轴只在Matplotlib中使用整数？

I'm plotting a histogram using the matplotlib.pyplot module and I am wondering how I can force the y-axis labels to only show integers (e.g. 0, 1, 2, 3 etc.) and not decimals (e.g. 0., 0.5, 1., 1.5, 2. etc.). I'm plotting a histogram using the matplotlib.p