human
Solve the following python programming problem given the following code:
def _get_keyword_values(self, keywords) : 
    keywords = self._split_keywords (keywords) 
    if (not keywords) : 
        return None 
node = self.node 
    mtime = to_datetime (node.last_modified, utc) 
    shortdate = mtime.strftime ('%Y-%m-%d %H:%M:%SZ') 
    longdate = mtime.strftime ('%Y-%m-%d %H:%M:%S +0000 (%a, %d %b %Y)') 
    created_rev = unicode (node.created_rev) 
    author = to_unicode (self._get_revprop (core.SVN_PROP_REVISION_AUTHOR)) 
    path = node.path.lstrip ('/') 
    url = (node.repos.get_path_url (path, node.rev) or path) 
    root_url = (node.repos.get_path_url ('', node.rev) or '/') 
    id_ = ' '.join ((node.name, created_rev, shortdate, author)) 
    data = { 
        'rev' : created_rev, 
        'author' : author, 
        'url' : url, 
        'date' : longdate, 
        'id' : id_, 
        'header' : ' '.join ((url, created_rev, shortdate, author)), 
        '%a' : author, 
        '%b' : node.name, 
        '%d' : shortdate, 
        '%D' : longdate, 
        '%P' : path, 
        '%r' : created_rev, 
        '%R' : root_url, 
        '%u' : url, 
        '%_' : ' ', 
        '%%' : '%', 
        '%I' : id_, 
        '%H' : ' '.join ((path, created_rev, shortdate, author)), 
} 
    def expand(match) : 
        match = match.group (0) 
        return data.get (match, match) 
values = { 
        
} 
    for (name, aliases) in self.KEYWORD_GROUPS.iteritems () : 
        if any (((kw in keywords) for kw in aliases)) : 
            values.update (((kw, data [name]) for kw in aliases)) 
for keyword in keywords : 
        if ('=' not in keyword) : 
            continue 
(name, definition) = keyword.split ('=', 1) 
        if (keywords not in self.KEYWORDS) : 
            values [name] = self.KEYWORD_EXPAND_RE.sub (expand, definition) 
if values : 
        return dict (((key, value.encode ('utf-8')) for (key, value) in values.iteritems ())) 
else : 
        return None 

    
    

    Fix the buggy line: if (keywords not in self.KEYWORDS) :
assistant
#Here is Python code to fix the buggy line: if (keywords not in self.

if (name not in self.KEYWORDS) :