Updating a list of python dictionaries with a key, value pair from another list

Question

Let\'s say I have the following list of python dictionary:

dict1 = [{\'domain\':\'Ratios\'},{\'domain\':\'Geometry\'}]

and a list like:

Answer 1

>>> l1 = [{'domain':'Ratios'},{'domain':'Geometry'}]
>>> l2 = [3, 6]
>>> for d,num in zip(l1,l2):
        d['count'] = num


>>> l1
[{'count': 3, 'domain': 'Ratios'}, {'count': 6, 'domain': 'Geometry'}]

Another way of doing it, this time with a list comprehension which does not mutate the original:

>>> [dict(d, count=n) for d, n in zip(l1, l2)]
[{'count': 3, 'domain': 'Ratios'}, {'count': 6, 'domain': 'Geometry'}]