text_plain_output_1.png image_output_1.png
import matplotlib.pyplot as plt

import pandas as pd # data processing, CSV file I/O (e.g. pd.read_csv)

import seaborn as sns

df = pd.read_csv('/kaggle/input/water-potability/water_potability.csv')

fig, ax = plt.subplots(figsize=(12, 6))
sns.heatmap(df.isnull(), ax=ax)
ax.set_title('Null values')