Simple matplotlib line plot with error bars

plot.py

import matplotlib.pyplot as plt
%matplotlib inline

plt.errorbar(
    [1,2,3],
    [1,2,3],
    yerr=[.1, .2, .3],
    color='blue', marker='o', linestyle='dashed',
    )
plt.title("Example")
plt.xlabel("x title")
plt.ylabel("y title")
plt.show()