Sort Users by Activity Level | Dataford Interview Questions

The 3DEXPERIENCE mobile app needs to display its most active users first. Given a list of user records, return the records sorted by descending activity count. If two users have the same activity count, order them by ascending user_id for deterministic output.

Return a new list and do not modify the input list.

Formal Specification

Implement sort_users(users), where users is a list of dictionaries. Each dictionary contains a string user_id and a non-negative integer activity_count. Return a list containing the same dictionaries in the required order.

Constraints

0 <= len(users) <= 10^5
user_id is a non-empty string
0 <= activity_count <= 10^9
Each user_id is unique
The input list must remain unchanged

Function Signature

def sort_users(users):

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