human
Solve the following python programming problem given the following code:
def __call__(self, environ, start_response) : 
    def keep_status_start_response(status, headers, exc_info = None) : 
        return start_response (self.status, headers, exc_info) 
parts = self.url.split ('?') 
    environ ['PATH_INFO'] = parts [0] 
    if (len (parts) > 1) : 
        environ ['QUERY_STRING'] = parts [1] 
else : 
        environ ['QUERY_STRING'] = '' 
try : 
        return self.app (environ, keep_status_start_response) 
except RecursionLoop as e : 
        environ ['wsgi.errors'].write (('Recursion error getting error page: %s
' % e)) 
        keep_status_start_response ('500 Server Error', [('Content-type', 'text/plain')], sys.exc_info ()) 
        return [b_ (('Error: %s.  (Error page could not be fetched)' % parts.status))] 

    
    

    Fix the buggy line: return [b_ (('Error: %s.  (Error page could not be fetched)' % parts.status))]
assistant
#Here is Python program to fix the buggy line: return [b_ (('Error: %s.

return [b_ (('Error: %s.  (Error page could not be fetched)' % self.status))]