I have this dictionary, where I would like to retrieve the value of 'id'. What would be the best way?
dict = {'total': 2, 'page': 0, 'pageSize': 10, 'count': 2, 'results': [{'id': 3, 'domainId': 1}]}
I have tried:
print (dict['id'])E KeyError: 'id'
if I print the keys, I only get:
['total', 'page', 'pageSize', 'count', 'results']
First things first, don't call your variable dict as that is the name of the Python type of a dictionary, so you're currently overwriting that function.
Let's call it d instead.
d = {
'total': 2,
'page': 0,
'pageSize': 10,
'count': 2,
'results': [
{'id': 3, 'domainId': 1}
]
}
Here we can see that d['results'] is what we want to query for the id. It's a list, so I would question whether you're always going to want the first thing or all of the things or just the last thing.
If it were me, I would first extract all ids, and then get the one I actually wanted.
We can get all ids as a list with:
[r['id'] for r in d['results'] if 'id' in r]
That means that if results was the following list, we'd get the following ids:
d['results'] == [
{'id': 3, 'domainId': 1},
{'id': 4},
{'domainId': 2},
{'giraffe': True}
]
ids = [r['id'] for r in d['results'] if 'id' in r]
ids == [3, 4]
At this point we could process all ids, or just get the first (ids[0]) or the last (ids[-1]).
If you know exactly which index it's going to be in results, you could access that directly.
d['results'][-1]['id']
id_value = dict['results'][0]['id']
Also, you generally shouldn't call your dictionaries dict in Python. dict is the name of a built-in function, and you might mess things up by overwriting it.
dict['results'][0]['id'] gets that value. Having the nested dictionary in a list convolutes things a bit.
dict['results'][0]['id'], dict['results'][1]['id']. I would advise against storing data like this as it isn't a very clear way of retrieving it. Maybe a class or a pandas DataFrame would be more suited?[x['id'] for x in dict['results'][:count]] could be an option. But again I would try and rethink your data structure.value = dict['results'][0]['id']
You use the dict['results'] to access the list in which the first element [0] that is a dictionary in which you can finally get the value of [id] .
The value of 'results' is a list whose first item is another dictionary. You can access the nested dictionary with index 0.
print(dict['results'][0]['id'])
