Data Conversion Error while applying a function to each row in pandas Python

Question

I have a data frame in pandas in python which resembles something like this -

    contest_login_count  contest_participation_count  ipn_ratio
0                   


        

Answer 1

I think there is problem dtype of some column is not float.

You need cast it by astype:

df['colname'] = df['colname'].astype(float)