如何循环到 dataframe pandas 中的列

Question

i am the newbie with pandas, can i loops 2 column by position 1 and 3 in pandas dataframe below

import pandas as pd
inp = [(9,8,7),(4,6,8),(8,4,7),(1,12,7)]

df = pd.DataFrame(data=inp,columns=["a","b","d"])
print(df)

the result will bee like this

tokyo
7
new york
8
london
7

Thanks you for your help!

Answer 1

Here is a solution from a previous post where they use a nested loop to loop through column names. You can also use the index to find specific locations in a pandas dataframe.