Deduplicate Customer Events | Dataford Interview Questions

Implement a function to deduplicate records from a list of customer events while preserving the most recent event for each customer.

Define deduplicate_events(events), where events is a list of dictionaries containing customer_id, timestamp, and event. Return one dictionary per customer. The record with the greatest timestamp is retained; if timestamps tie, keep the later input record. Return results in the order each customer first appears.

Input and Output

Input: list[dict]
Output: list[dict]

Constraints

0 <= len(events) <= 1000
Each event contains customer_id, timestamp, and event
customer_id is a non-empty string
timestamp is an integer
Timestamps for the same customer may be unsorted
The input list may contain multiple events for the same customer

Function Signature

def deduplicate_events(events):

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