def log_string(s):
global pred_log_t
+
t = time.time()
if pred_log_t is None:
elapsed = 'start'
else:
elapsed = '+{:.02f}s'.format(t - pred_log_t)
+
pred_log_t = t
+
s = Fore.BLUE + time.ctime() + ' ' + Fore.GREEN + elapsed + Style.RESET_ALL + ' ' + s
log_file.write(s + '\n')
log_file.flush()