Traceback (most recent call last):
File "/Users/rj/anaconda3/envs/py36/lib/python3.6/site-packages/flask/app.py", line 2292, in wsgi_app
response = self.full_dispatch_request()
File "/Users/rj/anaconda3/envs/py36/lib/python3.6/site-packages/flask/app.py", line 1815, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/Users/rj/anaconda3/envs/py36/lib/python3.6/site-packages/flask/app.py", line 1718, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/Users/rj/anaconda3/envs/py36/lib/python3.6/site-packages/flask/_compat.py", line 35, in reraise
raise value
File "/Users/rj/anaconda3/envs/py36/lib/python3.6/site-packages/flask/app.py", line 1813, in full_dispatch_request
rv = self.dispatch_request()
File "/Users/rj/anaconda3/envs/py36/lib/python3.6/site-packages/flask/app.py", line 1799, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/Users/rj/projects/errshot/app.py", line 46, in result
print('so_link : '+so_link)
TypeError: must be str, not NoneType