Pandas deleting row with df.drop doesn't work

I have a DataFrame like this (first column is index (786...) and second day (25...) and Rainfall amount is empty):

Day Rainfall amount (millimetres)  
786   25                              
787   26                              
788   27                              
789   28                              
790   29                              
791    1                              
792    2                              
793    3                              
794    4                              
795    5 

and I want to delete the row 790. I tried so many things with df.drop but nothin happend.

I hope you can help me.

Solution 1:

While dropping new DataFrame returns. If you want to apply changes to the current DataFrame you have to specify inplace parameter.

Option 1
Assigning back to df -

df = df.drop(790)

Option 2
Inplace argument -

df.drop(790, inplace=True)