How to delete an item in a list if it exists?

Question

I am getting new_tag from a form text field with self.response.get(\"new_tag\") and selected_tags from checkbox fields with

Answer 1

Eek, don't do anything that complicated : )

Just filter() your tags. bool() returns False for empty strings, so instead of

new_tag_list = f1.striplist(tag_string.split(",") + selected_tags)

you should write

new_tag_list = filter(bool, f1.striplist(tag_string.split(",") + selected_tags))

or better yet, put this logic inside striplist() so that it doesn't return empty strings in the first place.