pandas find which row has nan code example

Example 1: dataframe find nan rows

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

Example 2: find position of nan pandas

# position of NaN values in terms of index
df.loc[pandas.isna(df["b"]), :].index

# position of NaN values in terms of rows that cotnain NaN
df.loc[pandas.isna(df["b"]), :]