Answers for "insert multiple column pandas"

add values of two columns pandas

df['sum'] = df['a'] + df['b']  # sum is a new column

add values from 2 columns to one pandas

df['Fruit Total']= df.iloc[:, -4:-1].sum(axis=1)
print (df)
   Apples  Bananas  Grapes  Kiwis  Fruit Total
0     2.0      3.0     NaN    1.0          5.0
1     1.0      3.0     7.0    NaN         11.0
2     NaN      NaN     2.0    3.0          2.0

insert multiple column pandas

df['column_new_1'], df['column_new_2'], df['column_new_3'] = [np.nan, 'dogs', 3]