pandas merge 사용법
아래 사이트에 잘 나옴 merge, join, left, right https://www.shanelynn.ie/merge-join-dataframes-python-pandas-index-1/ # First, add the platform and device to the user usage - use a left join this time. result = pd.merge(user_usage, user_device[['use_id', 'platform', 'device']], on='use_id', how='left') # At this point, the platform and device columns are included # in the result along with all columns fro..
2022. 8. 15.
