How to sort-out similar values from dictionaries and concatenet them as on the example below? (Python)

Question

from operator import itemgetter

def sort_by_age(student_list):

student_list = [
{'name': 'Valentine', 'age': 30, 'city': 'Keln'},
{'name': 'Max', 'age': 20, 'city': 'Dallas'},
{'name': 'Bob', 'age': 32, 'city': 'LA'},
{'name': 'Andrew', 'age': 34, 'city': 'Keln'},
{'name': 'John', 'age': 50, 'city': 'Dallas'},
{'name': 'Colin', 'age': 21, 'city': 'LA'}
]

v = {} for key, value in sorted(d.items()): v.setdefault(value, []).append(key)

print("The list printed sorting by age: ")
print(sorted(student_list, key=itemgetter('age', 'city')))

In the code above something missing and it is not working properly but what I need is output like this:

Keln': [ {'name': 'Valentine', 'age': 30 },
{'name': 'Andrew', 'age': 34}],
'Dallas': [ {'name': 'Max', 'age': 20 },
{'name': 'John', 'age': 50}],
'LA': [ {'name': 'Bob', 'age': 32 },
{'name': 'Colin', 'age': 21}

Thanks everybody ahead!

Answer 1

I would do it like this
https://code.sololearn.com/c78KeHjhNO5q/?ref=app