Python Pandas for loop/while loop question

[deanhystad]

I think you are expecting k['num'] to return a list or closure. but it returns a DataFrame. The first time through the for loop the dataframe is [0 1] (what symbol does one use to denote a dataframe instead of a list or closure?) When you ask for k['num'][0] this works because the dataframe contains a zero. The second time through the loop k['num'] returns the dataframe [1 2]. This does not contain zero, so k['num'][0] raises a key error.