How to iterate over pandas dataframe and create new column

Question

I have a pandas dataframe that has 2 columns. I want to loop through it\'s rows and based on a string from column 2 I would like to add a string in a newly created 3th colum

Answer 1

You can also try this (if you want to keep the for loop you use) :

new_column = []

for i in df.index:
    if df.ix[i]['Column2']==variable1:
        new_column.append(variable2)
    elif df.ix[i]['Column2']==variable3:
        new_column.append(variable4)
    else : #if both conditions not verified
        new_column.append(other_variable)

df['Column3'] = new_column