Uninterrupted Study Sessions

PandasEasyJunior level~10 min

Problem

A focus app gives you two DataFrames. `studysession` has columns `session_id`, `user_id`, `start_min`, `end_min` (minute offsets within a day). `ping` has columns `ping_id`, `user_id`, `at_min` (the minute a notification fired).

Report the `session_id` of every study session during which the **same user** received **no** ping. A ping interrupts a session if it fired at any minute from `start_min` to `end_min`, inclusive.

Return a single column `session_id` in any order.

Input data

Example rows — the live problem includes the full dataset.

studysession

session_id	user_id	start_min	end_min
1	1	1	5
2	1	15	23
3	2	10	12
4	2	17	28
5	12	2	13

ping

ping_id	user_id	at_min
1	1	5
2	2	17
3	12	20

Expected output

Your answer should return 3 rows with the columns session_id.

Starter code (Pandas (Python))

import pandas as pd

def uninterrupted_study_sessions(studysession, ping) -> pd.DataFrame:
    # Your code here
    return studysession

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