set axis limits in matplotlib pyplot

I have two subplots in a figure. I want to set the axes of the second subplot such that it has the same limits as the first subplot (which changes depending on the values plotted). Can someone please help me? Here is the code: import matplotlib.pyplot as plt plt.figure(1, figsize = (10, 20)) ## First subplot: Mean value in each period (mean over replications) plt.subplot(211, axisbg = 'w') plt.plo