I have the following list of objects:
l = [{'name': 'Mike', 'age': 31},
{'name': 'Peter', 'age': 29},
{'name': 'Mike', 'age': 44}]
I want to filter it based on the name, and because "Mike" is a duplicate in this case, I want to remove all entries with name=Mike (regardless of the age).
(i.e. to get the same list but without the entries that have name=Mike)
What’s the best approach to do that?
>Solution :
You can use a Counter to get the counts of all names. Then filter the names that appear more than once:
from collections import Counter
l = [{'name': 'Mike', 'age': 31},
{'name': 'Peter', 'age': 29},
{'name': 'Mike', 'age': 44}]
names_count = Counter(d['name'] for d in l)
new_l = list(filter(lambda d: names_count[d['name']] == 1, l))
print(new_l)
Will give:
[{'name': 'Peter', 'age': 29}]