On Sunday, 31 October 2021, Albert-Jan Roskam <sjeik_appie at hotmail.com> wrote: > > > > df['URL'] = df.apply(lambda x: connect(df['URL']), axis=1) > > > I think you need axis=0. Or use the Series, df['URL'] = > df.URL.apply(connect) > Any details? I will try and let you know. Regards, David