python - How to merge list of dicts

Question

How to merge a list of dictionaries in Python? I have 2 sets of data:

a = [{'date':'1/1/2019'},{'date':'1/1/2020'},{'date':'1/1/2021'}]
b = [{'value':'2'},{'value':'5'},{'value':'6'}]

How can I merge it to the below result?

[{'date':'1/1/2019','value':'2'},
 {'date':'1/1/2020','value':'5'},
 {'date':'1/1/2021','value':'6'}]

Answer 1

Assuming that both are lists of dicts of the same length, you can do:

c = [{**_d, **b[i]} for i, _d in enumerate(a)]