how to merge rows of a df with same value

I am facing a problem using pandas on python and i can’t solve it.
I would like to merge/combine/regroup the rows which have the same url.

EDIT :
I have a dataframe looking like this :

I would like something like this :

I’ve tried using groupby, but in my df i’ve datas which don’t have URL and i want to keep them.
I’ve also tried merge with inner, which gives me pretty good results but i don’t know why it decuplates the number of rows inside my df.

thank you.

>Solution :

You can use groupby and first.

df = df.groupby('url', as_index=False).first()