df_sub = df[["col1", "col2"]] df_sub = df_sub.dropna() df_sub.groupby(['col1','col2']).size().reset_index().rename(columns={0:'count'})
df_sub = df[["col1", "col2"]] df_sub = df_sub.dropna() df_sub.groupby(['col1','col2']).size().reset_index().rename(columns={0:'count'})