Education Attendance Monitoring Agent

import pandas as pd
from datetime import datetime

def load_attendance(csv_file):
    df = pd.read_csv(csv_file)
    return df.groupby('student').agg({'present': 'sum', 'total': 'sum'})

def calculate_rate(row):
    return (row['present'] / row['total']) * 100

result = load_attendance('attendance.csv')
result['rate'] = result.apply(calculate_rate, axis=1)
at_risk = result[result['rate'] < 75]
print(json.dumps(at_risk.index.tolist()))