Plot figure in the center of jupyter notebook

centering_plots_in_jupyter.py

import numpy as np
from IPython.core.display import HTML
import matplotlib.pyplot as plt

# if you like seaborn:
import seaborn as sns
sns.set()
sns.set_context("talk")

HTML("""
<style>
.output_png {
    display: table-cell;
    text-align: center;
    vertical-align: middle;
}
</style>
""")

# plot a normal dist.
mu, sigma = 38, 3 # mean and standard deviation
s = np.random.normal(mu, sigma, 1000)

count, bins, ignored = plt.hist(s, 13, density=True)
plt.plot(bins, 1/(sigma * np.sqrt(2 * np.pi)) *
               np.exp( - (bins - mu)**2 / (2 * sigma**2) ),
         linewidth=2, color='r')
plt.show()

you will see this: