pandas check how many nan in column code example

Example 1: dataframe find nan rows

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

Example 2: count nan pandas

#Python, pandas
#Count missing values for each column of the dataframe df

df.isnull().sum()

Example 3: find nan values in a column pandas

df.isnull().values.any()

Example 4: count rows with nan pandas

np.count_nonzero(df.isnull().values)   
 np.count_nonzero(df.isnull())           # also works