Equivalent of Paste R to Python

Question

I am a new python afficionado. For R users, there is one function : paste that helps to concatenate two or more variables in a dataframe. It\'s very useful. For example Suppose

Answer 1

If you want to just paste two string columns together, you can simplify @shouldsee's answer because you don't need to create the function. E.g., in my case:

df['newcol'] = df['id_part_one'].str.cat(df['id_part_two'], sep='_')

It might be required for both Series to be of dtype object in order to this (I haven't verified).