numpy.random.shuffle returns None

Question

I installed numpy1.8.2 and then I tried the following code:

import numpy as np
a = np.arange(10)
print a, np.random.shuffle(a)

but

Answer 1

shuffle works in place and therefore does not return a value.

In [1]: x = range(9)

In [2]: x
Out[2]: [0, 1, 2, 3, 4, 5, 6, 7, 8]

In [5]: print numpy.random.shuffle(x)
None

In [6]: x
Out[6]: [8, 7, 3, 4, 6, 0, 5, 1, 2]