Pandas string methods

gistfile1.py

In [1]: import pandas as pd

In [2]: df = pd.DataFrame({"col1": ["one.two", "three.four", "five.six"]})

In [3]: df['col_idx_0'] = df['col1'].str.split('.').str.get(0)

In [4]: df['col_idx_1'] = df['col1'].str.split('.').str.get(1)

In [5]: df
Out[5]: 
         col1 col_idx_0 col_idx_1
0     one.two       one       two
1  three.four     three      four
2    five.six      five       six