Filter tags problem

• categories: Code, Interview Question
• source: https://leetcode.com/discuss/interview-question/2639509/DataDog-Interview-Question

https://leetcode.com/discuss/interview-question/2639509/DataDog-Interview-Question

from typing import List
 
def filter_stream(stream: List[str], keywords: List[str]) -> List[str]:
    # Convert keywords to a set for efficient lookups
    keyword_set = set(keywords)
 
    # Result set to hold unique tags not in the keywords
    result_set = set()
 
    for line in stream:
        # Split the line into individual tags and convert to a set
        tags = set(tag.strip() for tag in line.split(","))
 
        # Check if the line contains any of the keywords
        if keyword_set & tags:
            # Add tags not in the keywords to the result set
            result_set.update(tags - keyword_set)
 
    # Return the result as a list
    return list(result_set)