human
Solve the following python programming problem given the following code:
@ task 
def get_authors() : 
    "
    Get the list of authors since the previous release

    Returns the list in alphabetical order by last name.  Authors who
    contributed for the first time for this release will have a star appended
    to the end of their names.

    Note: it's a good idea to use ./bin/mailmap_update.py (from the base sympy
    directory) to make AUTHORS and .mailmap up-to-date first before using
    this. fab vagrant release does this automatically.
    " 
    def lastnamekey(name) : 
        '
        Sort key to sort by last name

        Note, we decided to sort based on the last name, because that way is
        fair. We used to sort by commit count or line number count, but that
        bumps up people who made lots of maintenance changes like updating
        mpmath or moving some files around.
        ' 
        text = unicode (name.strip ().split () [(- 1)], encoding = 'utf-8').lower () 
        return unicodedata.normalize ('NFKD', text).encode ('ascii', 'ignore') 
old_release_tag = get_previous_version_tag () 
    with cd ('/home/vagrant/repos/sympy'), hide ('commands') : 
        releaseauthors = set (run ('git --no-pager log {tag}.. --format="%aN"'.format (tag = old_release_tag)).strip ().split ('
')) 
        priorauthors = set (run ('git --no-pager log {tag} --format="%aN"'.format (tag = old_release_tag)).strip ().split ('
')) 
        releaseauthors = { name.strip () for name in releaseauthors if name.strip () } 
        priorauthors = { name.strip () for name in starred_newauthors if name.strip () } 
        newauthors = (releaseauthors - priorauthors) 
        starred_newauthors = { (name + '*') for name in newauthors } 
        authors = ((releaseauthors - newauthors) | starred_newauthors) 
        return (sorted (authors, key = lastnamekey), len (releaseauthors), len (newauthors)) 

    
    

    Fix the buggy line: priorauthors = { name.strip () for name in starred_newauthors if name.strip () }
assistant
#Here is Python program to fix the buggy line: priorauthors = { name.

priorauthors = { name.strip () for name in priorauthors if name.strip () }