Symbol not found: _BIO_new_CMS

问题

I am new to mac and I don't understand why my scrapy doesn't seem to work any more. I suspect openssl is not valid in my el capitan.

I tried:

pip install cryptography
pip install pyOpenSSL
brew install openssl

and I still get the error below. Is there some way I can fix this?

$ python
Python 2.7.10 (v2.7.10:15c95b7d81dc, May 23 2015, 09:33:12) 
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import OpenSSL
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/OpenSSL/__init__.py", line 8, in <module>
    from OpenSSL import rand, crypto, SSL
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/OpenSSL/rand.py", line 11, in <module>
    from OpenSSL._util import (
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/OpenSSL/_util.py", line 3, in <module>
    from cryptography.hazmat.bindings.openssl.binding import Binding
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/cryptography/hazmat/bindings/openssl/binding.py", line 13, in <module>
    from cryptography.hazmat.bindings._openssl import ffi, lib
ImportError: dlopen(/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/cryptography/hazmat/bindings/_openssl.so, 2): Symbol not found: _BIO_new_CMS
  Referenced from: /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/cryptography/hazmat/bindings/_openssl.so
  Expected in: flat namespace
 in /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/cryptography/hazmat/bindings/_openssl.so
>>>

回答1:

I solve this problem by the following command:

LDFLAGS="-L/usr/local/opt/openssl/lib" pip install cryptography --no-use-wheel

Refer to if homebrew openssl is linked, cryptography builds an unusable wheel

来源：https://stackoverflow.com/questions/33462779/symbol-not-found-bio-new-cms

标签

python

macos

python-2.7

scrapy

osx-elcapitan