Traceback (most recent call last):


 "<stdin>", line 1, in <module>


 "/usr/lib/python2.7/site-packages/tqdm/__init__.py", line 1, in <module>

from ._tqdm import tqdm


 "/usr/lib/python2.7/site-packages/tqdm/_tqdm.py", line 14, in <module>

from ._utils import _supports_unicode, _environ_cols_wrapper, _range, _unich, \


 "/usr/lib/python2.7/site-packages/tqdm/_utils.py", line 3, in <module>

from platform import system as _curos
ImportError: cannot import name system

Traceback (most recent call last):


 "/usr/local/bin/certbot", line 11, in <module>

load_entry_point('certbot==0.10.1', 'console_scripts', 'certbot')()


 "/usr/local/Cellar/certbot/0.10.1/libexec/lib/python2.7/site-packages/pkg_resources/__init__.py", line 561, in load_entry_point

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


 "/usr/local/Cellar/certbot/0.10.1/libexec/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2631, in load_entry_point

return ep.load()


 "/usr/local/Cellar/certbot/0.10.1/libexec/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2291, in load

return self.resolve()


 "/usr/local/Cellar/certbot/0.10.1/libexec/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2297, in resolve

module = __import__(self.module_name, fromlist=['__name__'], level=0)


 "/usr/local/Cellar/certbot/0.10.1/libexec/lib/python2.7/site-packages/certbot/main.py", line 13, in <module>

from acme import jose


 "/usr/local/Cellar/certbot/0.10.1/libexec/lib/python2.7/site-packages/acme/jose/__init__.py", line 37, in <module>

from acme.jose.interfaces import JSONDeSerializable


 "/usr/local/Cellar/certbot/0.10.1/libexec/lib/python2.7/site-packages/acme/jose/interfaces.py", line 9, in <module>

from acme.jose import util


 "/usr/local/Cellar/certbot/0.10.1/libexec/lib/python2.7/site-packages/acme/jose/util.py", line 5, in <module>

import OpenSSL


 "/usr/local/Cellar/certbot/0.10.1/libexec/lib/python2.7/site-packages/OpenSSL/__init__.py", line 8, in <module>

from OpenSSL import rand, crypto, SSL


 "/usr/local/Cellar/certbot/0.10.1/libexec/lib/python2.7/site-packages/OpenSSL/rand.py", line 12, in <module>

from OpenSSL._util import (


 "/usr/local/Cellar/certbot/0.10.1/libexec/lib/python2.7/site-packages/OpenSSL/_util.py", line 6, in <module>

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


 "/usr/local/Cellar/certbot/0.10.1/libexec/lib/python2.7/site-packages/cryptography/hazmat/bindings/openssl/binding.py", line 14, in <module>

from cryptography.hazmat.bindings._openssl import ffi, lib
ImportError: dlopen(/usr/local/Cellar/certbot/0.10.1/libexec/lib/python2.7/site-packages/cryptography/hazmat/bindings/_openssl.so, 2): Symbol not found: _getentropy
