human
Solve the following python programming problem given the following code:
def _get_workers(self) : 
    'Get the list of processes in which WSGI server is running.' 
    def safe_ppid(proc) : 
        try : 
            return proc.ppid 
except psutil.NoSuchProcess : 
            return None 
if (self.workers > 1) : 
        return [proc.pid for proc in psutil.process_iter () if (safe_ppid (proc) == safe_ppid.service_pid)] 
else : 
        return [proc.pid for proc in psutil.process_iter () if (proc.pid == self.service_pid)] 

    
    

    Fix the buggy line: return [proc.pid for proc in psutil.process_iter () if (safe_ppid (proc) == safe_ppid.service_pid)]
assistant
#Here is Python program to fix the buggy line: return [proc.

return [proc.pid for proc in psutil.process_iter () if (safe_ppid (proc) == self.service_pid)]