데이터 통합

import pandas as pd df1 = pd.read_csv('/content/drive/MyDrive/user_demographics.csv', index_col=0) df2 = pd.read_csv('/content/drive/MyDrive/user_activity.csv', index_col=0) df3 = pd.read_csv('/content/drive/MyDrive/book_reading_status.csv', index_col=0) df = pd.merge(df1, df2, on='user_id') df = pd.merge(df, df3, on='user_id') print(df)