How to use “not” in xpath?

Question

I want to write something of the sort:

//a[not contains(@id, \'xx\')]

(meaning all the links that there \'id\' attribute doesn\'t contain t

Answer 1

None of these answers worked for me for python. I solved by this

a[not(@id='XX')]

Also you can use or condition in your xpath by | operator. Such as

a[not(@id='XX')]|a[not(@class='YY')]

Sometimes we want element which has no class. So you can do like

a[not(@class)]