Python pandas apply function if a column value is not NULL

Question

I have a dataframe (in Python 2.7, pandas 0.15.0):

df=
       A    B               C
0    NaN   11             NaN
1    two  NaN  [\'foo\', \'bar\']
2  three   3         


        

Answer 1

I had a column contained lists and NaNs. So, the next one worked for me.

df.C.map(lambda x: my_func(x) if type(x) == list else x)