Removing empty elements of the Python list

If the rule of determining the "empty" "element is more complicated, it is enough to describe this rule after the operator if in the above expressions, for example,

  [Value  for  value  in  values ​​ if  value! = [ none ]]     
 will leave elements in the list that are not equal to the list containing  none  (it is important to notice that such a list will be missed into the final set in the first cases).