How to undo the changes made in original DataFrame?

Question

I am working with a dataset. As a precautionary measure, I created a back-up copy using the following command.

Orig. Dataframe = df

df_copy = df.copy(deep = True)

Now, I dropped few columns from original dataframe (df) by mistake using inplace = True. I tried to undo the operation, but no use.

So, the question is how to get my original dataframe (df) from copied dataframe (df_copy) ?

Answer 1

Yoy cannot restore it. Code like below dosen't work.

df = df_copy.copy(deep = True)

Every variables which reference original df keep reference after operation above.