Python

df[df.isnull().any(axis=1)]

df[df['col'].isnull()]

df.isnull().sum().sum()
5

> df.isnull().any().any()
True

for i, row in df.iterrows():
value = row["Name"]
if pd.isnull(value):
    dosomething()

df.fillna(method='ffill')

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