how to fill dataframe with 0 in place of nan values code example

Example 1: how to replace nan with 0 in pandas

df['product']=df['product'].fillna(0)
df['context']=df['context'].fillna(0)
df

Example 2: dataframe fill nan with mode

df['Column_Name'].fillna(df['Column_Name'].mode()[0], inplace=True)