df check nan code example

Example 1: count nan pandas

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

df.isnull().sum()

Example 2: to detect if a data frame has nan values

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

Example 3: to detect if a data frame has nan values

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

Example 4: pandas nan values in column

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