[Tutor] dictionary keys

[Alex Kleider]

I've got a fairly large script that uses a dictionary (called 'ipDic') 
each
value of which is a dictionary which in turn also has values which are 
not
simple types.
Instead of producing a simple list,
"""
ips = ipDic.keys()
print(ips)
"""
yields
"""
dict_keys(['61.147.107.120', '76.191.204.54', '187.44.1.153'])
"""

Searching my code for 'dict_keys' yields nothing.  I've no idea where it 
comes from.

I've been unable to reproduce this behaviour using simpler dictionaries 
which seem to work as I expect:
>>> d = dict(a=1, b=2, c=3)
>>> d
{'a': 1, 'c': 3, 'b': 2}
>>> d.keys()
['a', 'c', 'b']
>>> print(d.keys())
['a', 'c', 'b']
>>> 

Can anyone shed light on why instead of getting the <list I'm expecting> 
I
get "dict_keys( <list I'm expecting> )"?

(Using Python3, on Ubuntu  12.4)

Thanks,
Alex