gistfile1.txt

In [1]: import pandas as pd

In [2]: df = pd.DataFrame({'foo': ['a', 'a', 'b', 'b'], 'bar': [1,2,3,4]})

In [3]: g = df.groupby('foo')

In [5]: for group in g:
   ...:     print(group)
   ...:     
('a',    bar foo
0    1   a
1    2   a)
('b',    bar foo
2    3   b
3    4   b)