Traceback (most recent call last):


 "migrate.py", line 7, in <module>

models.db.migrate(**app.config['DB_PARAMS'])


 "/home/john/.virtualenv/word/lib/python3.6/site-packages/pony/orm/core.py", line 728, in migrate

return migrate(self, command)


 "/home/john/.virtualenv/word/lib/python3.6/site-packages/pony/migrate/command.py", line 61, in migrate

return _migrate(db, cmd, **kwargs)


 "/home/john/.virtualenv/word/lib/python3.6/site-packages/pony/migrate/command.py", line 96, in _migrate

return graph.make(db=db, empty=empty, custom=custom, description=name)


 "/home/john/.virtualenv/word/lib/python3.6/site-packages/pony/migrate/migration.py", line 289, in make

generated = writer.as_string()


 "/home/john/.virtualenv/word/lib/python3.6/site-packages/pony/migrate/writer.py", line 351, in as_string

body = self._get_operations_block(imports)


 "/home/john/.virtualenv/word/lib/python3.6/site-packages/pony/migrate/writer.py", line 316, in _get_operations_block

self.operations = self._get_ops()


 "/home/john/.virtualenv/word/lib/python3.6/site-packages/pony/migrate/writer.py", line 251, in _get_ops

if attr.entity is not entity: assert False, 'Not implemented'
AttributeError: 'NoneType' object has no attribute 'entity'

Traceback (most recent call last):


 "/usr/bin/certbot", line 9, in <module>

load_entry_point('certbot==0.25.1', 'console_scripts', 'certbot')()


 "/usr/lib/python2.7/site-packages/pkg_resources.py", line 378, in load_entry_point

return get_distribution(dist).load_entry_point(group, name)


 "/usr/lib/python2.7/site-packages/pkg_resources.py", line 2566, in load_entry_point

return ep.load()


 "/usr/lib/python2.7/site-packages/pkg_resources.py", line 2260, in load

entry = __import__(self.module_name, globals(),globals(), ['__name__'])


 "/usr/lib/python2.7/site-packages/certbot/main.py", line 21, in <module>

from certbot import client


 "/usr/lib/python2.7/site-packages/certbot/client.py", line 16, in <module>

from acme import client as acme_client


 "/usr/lib/python2.7/site-packages/acme/client.py", line 39, in <module>

urllib3.contrib.pyopenssl.inject_into_urllib3()
AttributeError: 'module' object has no attribute 'pyopenssl'
