IPython.parallel.Client behavior as iterator

[skiguy0123]

Iterating over a Client only works if the engine ids start at 0, resulting in inconsistent behavior:

In [1]: from IPython.parallel import Client

In [2]: c = Client()

In [3]: print c[:]
<DirectView [0, 1, 2, 3]>

In [4]: for ct in c:
   ...:     print ct
   ...:     
<DirectView 0>
<DirectView 1>
<DirectView 2>
<DirectView 3>

In [5]: c = Client()

In [6]: print c[:]
<DirectView [4, 5, 6, 7]>

In [7]: for ct in c:
   ...:     print ct
   ...:     

In [8]: 

Whether Client should be an iterator or not, I think it should at least be consistent.

[minrk]

I didn't intend for Client to be iterable (it's a side effect of defining __getitem__). Might as well make it consistent, since the behavior is already there.

[skiguy0123]

Thanks!