data/multi_lingual/9v21ish7.py

def true_code():
    import pandas as pd
    data = pd.read_csv("raw_data/main_data.csv")
    data = data[data["city"] == "Mumbai"]
    data["Timestamp"] = pd.to_datetime(data["Timestamp"])
    data = data[data["Timestamp"].dt.year == 2023]
    data["Month"] = data["Timestamp"].dt.month
    data = data.groupby("Month")["PM2.5"].mean().idxmax()
    print(data)

true_code()