find nan in column pandas code example

Example 1: 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"]), :]

Example 2: find nan values in a column pandas

df['your column name'].isnull().sum()