# Basic syntax:
plt.ylim(min,max)
plt.xlim(min,max)

# Example usage:
import matplotlib.pyplot as plt
plt.plot(range(5))
plt.xlim(-5, 5)
plt.ylim(-5, 5)

# Note, this approach is more versatile than using range=[min,max] which
#     only works in some plots, e.g. plt.hist(range(5), range=[-5,5])