text_html_output_1.png
import matplotlib.pyplot as plt

import pandas as pd

import seaborn as sn

train = pd.read_csv('../input/titanic/train.csv')
test = pd.read_csv('../input/titanic/test.csv')

plt.figure(figsize=(10, 10))
sn.heatmap(train.isnull(), yticklabels=False, cbar=False)