Traceback (most recent call last):


 "./keras_retinanet/bin/convert_model.py", line 34, in <module>

from ..utils.config import read_config_file, parse_anchor_parameters


 "./keras_retinanet/bin/../../keras_retinanet/utils/config.py", line 20, in <module>

from ..utils.anchors import AnchorParameters


 "./keras_retinanet/bin/../../keras_retinanet/utils/anchors.py", line 20, in <module>

from ..utils.compute_overlap import compute_overlap
ImportError: No module named compute_overlap

Traceback (most recent call last):


 "/opt/eff.org/certbot/venv/bin/letsencrypt", line 7, in <module>

from certbot.main import main


 "/opt/eff.org/certbot/venv/local/lib/python2.7/site-packages/certbot/main.py", line 10, in <module>

import josepy as jose


 "/opt/eff.org/certbot/venv/local/lib/python2.7/site-packages/josepy/__init__.py", line 44, in <module>

from josepy.interfaces import JSONDeSerializable


 "/opt/eff.org/certbot/venv/local/lib/python2.7/site-packages/josepy/interfaces.py", line 8, in <module>

from josepy import errors, util


 "/opt/eff.org/certbot/venv/local/lib/python2.7/site-packages/josepy/util.py", line 4, in <module>

import OpenSSL


 "/opt/eff.org/certbot/venv/local/lib/python2.7/site-packages/OpenSSL/__init__.py", line 8, in <module>

from OpenSSL import rand, crypto, SSL


 "/opt/eff.org/certbot/venv/local/lib/python2.7/site-packages/OpenSSL/rand.py", line 12, in <module>

from OpenSSL._util import (


 "/opt/eff.org/certbot/venv/local/lib/python2.7/site-packages/OpenSSL/_util.py", line 6, in <module>

from cryptography.hazmat.bindings.openssl.binding import Binding


 "/opt/eff.org/certbot/venv/local/lib/python2.7/site-packages/cryptography/hazmat/bindings/openssl/binding.py", line 157, in <module>

Binding.init_static_locks()


 "/opt/eff.org/certbot/venv/local/lib/python2.7/site-packages/cryptography/hazmat/bindings/openssl/binding.py", line 141, in init_static_locks

__import__("_ssl")
ImportError: No module named _ssl
