[판다스] Nan 값 있는 행 대체하며 merge

https://stackoverflow.com/questions/59045507/how-to-merge-two-dataframes-and-keep-the-non-nan-values-in-it

How to merge two dataframes and keep the non -nan values in it

 

merge 대신 update 이용하기.

예시 :

df1.update(df2)