我有一个SQL代码，我想把它转换成python。任务是按城市和属性类型找到卧室和浴室的平均数量。下面是SQL代码：

SELECT city, property_type, SUM(bathrooms)/COUNT(bathrooms) AS avg_bathrooms,
SUM(bedrooms)/COUNT(bedrooms) AS avg_bedrooms

FROM airbnb_search_details

GROUP BY property_type, city

这是我想到的，但我在这一部分卡住了：

import pandas as pd

airbnb_search_details.head()
df = airbnb_search_details

mean_bedrooms = df.groupby(['city', 'property_type'])['bedrooms'].mean()
mean_bathrooms = df.groupby(['city', 'property_type'])['bedrooms'].mean()

我将感激你的帮助。