在给定位置的连接和断开时间的情况下查找当前活动连接

Question

I have a dataframe that has connection date , disconnection date , rowID and RouterName . I want to find the current active connections in a while loop which iterates every minutes(this can be changed to any minutes) for 24 hours. I am trying to calculate the count of people in the location from this dataset which i will later use for calculating the agents risk level of being infected with corona or any airborne infectious disease. I cant find a way to calculate this from dataset using python pandas.

Answer 1

I'm going to make a few assumptions:

1. every device Id is unique and there are no collisions

2. you are looking only for devices which are currently connected

3. a connected device has a null disconnect_at

   active = df[df.disconnect_at < curr_timestamp] counts = active.groupby(“router_name”).agg({“device_id”:pd.Series.nunique})

Something like this should work