Mentees per Mentor

PandasEasyJunior level~10 min

Problem

A `member` DataFrame describes a coding club. Each row has `member_id`, `full_name`, `mentor_id` (the `member_id` of the person who mentors them, or NaN if none), and `years_experience`.

A **mentor** is any member who has at least one other member assigned to them. For each mentor, return their `member_id`, their `full_name`, the number of mentees they have (`mentee_count`), and the average years of experience of those mentees rounded to the nearest integer (`avg_mentee_experience`). Order the result by `member_id`.

Input data

Example rows — the live problem includes the full dataset.

member

member_id	full_name	mentor_id	years_experience
1	Maya		12
2	Liam	1	4
3	Noa	1	6
4	Eli	2	2

Expected output

Your answer should return 2 rows with the columns member_id, full_name, mentee_count, avg_mentee_experience.

Starter code (Pandas (Python))

import pandas as pd

def mentees_per_mentor(member: pd.DataFrame) -> pd.DataFrame:
    # Your code here
    return member

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