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

import matplotlib.pyplot as plt
import seaborn as sns
df = pd.read_csv('/kaggle/input/covid19-dataset/Covid Data.csv')

df.loc[df.DATE_DIED != '9999-99-99', 'DATE_DIED'] = 1
df.loc[df.DATE_DIED == '9999-99-99', 'DATE_DIED'] = 2
df.tail()