0.17 series & dataframe non-commutability
`import pandas as pd`
`import numpy as np`

`index = pd.date_range('1-Jan-2016',periods=12,freq='MS')`
`a = pd.DataFrame(np.ones((12,5)),index)`
`b = pd.Series(4.,index)`

`print a.multiply(b,axis=0)`

out:
                     0  1  2  3  4
2016-01-01  4  4  4  4  4
2016-02-01  4  4  4  4  4
2016-03-01  4  4  4  4  4
2016-04-01  4  4  4  4  4
2016-05-01  4  4  4  4  4
2016-06-01  4  4  4  4  4
2016-07-01  4  4  4  4  4
2016-08-01  4  4  4  4  4
2016-09-01  4  4  4  4  4
2016-10-01  4  4  4  4  4
2016-11-01  4  4  4  4  4
2016-12-01  4  4  4  4  4

`print b.multiply(a,axis=0)`

out: ValueError: operands could not be broadcast together with shapes (12,) (12,5)
