Exception when using resume feature in Python 3.6

[deibit]

`Waiting for threads to stop...
Keep a resume file? [y/N] y
setting line to 532
Traceback (most recent call last):
File "./cansina.py", line 374, in
if not manager.get_a_task(visitors_alive):
File "...cansina/core/dbmanager.py", line 53, in get_a_task
task = self.queue.get(False)
File "/usr/local/Cellar/python/3.6.4_3/Frameworks/Python.framework/Versions/3.6/lib/python3.6/queue.py", line 160, in get
if not self._qsize():
File "/usr/local/Cellar/python/3.6.4_3/Frameworks/Python.framework/Versions/3.6/lib/python3.6/queue.py", line 203, in _qsize
return len(self.queue)
KeyboardInterrupt

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "./cansina.py", line 383, in
pickle.dump(resumer, f)
TypeError: write() argument must be str, not bytes`