511. Game Play Analysis I.md

511. Game Play Analysis I

Question Link

Intuition

Knowledge of this test:

• if you don't use inplace = True in rename, the output will not change the name of the column.

So you have 2 choices:

• No.1:

result = activity.rename(columns={'event_date':'first_login'})
return result

• N0.2:

activity.rename(columns={'event_date':'first_login'},inplace=True)
return activity

The solution below is the latter one.

Code

import pandas as pd

def game_analysis(activity: pd.DataFrame) -> pd.DataFrame:

    activity=activity.loc[:,['player_id','event_date']]
    activity=activity.groupby(['player_id'])['event_date'].min().reset_index()
    activity.rename(columns={'event_date':'first_login'},inplace=True)
    
    return activity