Fetch certain values from dictionary

Question

I have below dictionary. I need to drop OS::<name> from this dictionary (In this case first 3 key,value pairs). I am only interested in the rest of the key,value pairs. How can I achieve this? It would help if I can get the logic to be as short as possible.

{u'OS::project_id': u'xyz', 
u'OS::stack_id': u'xyz', 
u'OS::stack_name': u'XYZ', 
u'image': u'RHEL-7.2', 
u'private_network_id': u'xyz', 
u'floating_ip': u'xyz', 
u'volume_type': u'ceph_fake', 
u'volume_size': u'10', 
u'key': u'my_key', 
u'flavor': u'm1.small'}

What have you tried, and what exactly is the problem with it. Note that dictionaries are unordered; they don't have a "first" key. — jonrsharpe, Jul 19 '17 at 06:53
Dict comprehension? It seems pretty simple. Where are you stuck? Or did you not try anything? — cs95, Jul 19 '17 at 06:54
`{key: value for key, value in d.items() if not key.startswith('OS::')}` — Rahul, Jul 19 '17 at 06:56
I thought this was read by you guys https://stackoverflow.com/help/be-nice — Heenashree Khandelwal, Jul 19 '17 at 07:09
If you are wondering about the downvotes, they are most likely because of the total lack of research effort displayed on your part. This question has been asked a thousand times before. — SiHa, Jul 19 '17 at 07:11

score 1 · Accepted Answer · answered Jul 19 '17 at 06:54

1

use dict comprehension.

{key: value for key, value in d.iteritems()  if not key.startswith('OS::')}

{u'flavor': u'm1.small',
 u'floating_ip': u'xyz',
 u'image': u'RHEL-7.2',
 u'key': u'my_key',
 u'private_network_id': u'xyz',
 u'volume_size': u'10',
 u'volume_type': u'ceph_fake'}

answered Jul 19 '17 at 06:54

Vishnu Upadhyay

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why negative votes? – Vishnu Upadhyay Jul 19 '17 at 06:56
I got my answer, not sure about the neg votes though. Voted up. Thanks @VishnuUpadhyay – Heenashree Khandelwal Jul 19 '17 at 07:00
@VishnuUpadhyay: Because you have answered the question they indented to. In python 3 `d.items()` will do the same trick. – Rahul Jul 19 '17 at 07:02
@Rahul there is no tag of python3 that's why i prefer python2.7. – Vishnu Upadhyay Jul 19 '17 at 07:07
Oh. I didn't see it. – Rahul Jul 19 '17 at 07:07

Fetch certain values from dictionary

1 Answers1