在 macOS 10.14.6 上的 Python 3.7.4 中导入 ssl 时出错

Question

为什么在 python3 中尝试导入 ssl 时出现错误？

Python 3.7.4 (default, Jul  9 2019, 18:13:23) 
[Clang 10.0.1 (clang-1001.0.46.4)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import ssl
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/Cellar/python/3.7.4/Frameworks/Python.framework/Versions/3.7/lib/python3.7/ssl.py", line 98, in <module>
    import _ssl             # if we can't import it, let the error propagate
ImportError: dlopen(/usr/local/Cellar/python/3.7.4/Frameworks/Python.framework/Versions/3.7/lib/python3.7/lib-dynload/_ssl.cpython-37m-darwin.so, 2): Library not loaded: /usr/local/opt/openssl/lib/libssl.1.0.0.dylib
  Referenced from: /usr/local/Cellar/python/3.7.4/Frameworks/Python.framework/Versions/3.7/lib/python3.7/lib-dynload/_ssl.cpython-37m-darwin.so
  Reason: image not found

我很难通过 pip 安装软件包，这似乎引发了 SSL 错误。

Answer 1

我遇到了完全相同的问题，一旦我使用 brew 将我的 Python 版本升级到 3.7.6，这个问题就解决了。

brew upgrade python3

这引发了一个权限被拒绝错误，但更新还是完成了，之后我就可以导入 ssl：

Python 3.7.6 (default, Dec 30 2019, 19:38:28) 
[Clang 11.0.0 (clang-1100.0.33.16)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import ssl
>>> ssl
<module 'ssl' from '/usr/local/Cellar/python/3.7.6_1/Frameworks/Python.framework/Versions/3.7/lib/python3.7/ssl.py'>
>>> 

Answer 2

使用自制软件在 osx 上为我修复的是切换到旧版本的 openssl：

brew switch openssl 1.0.2s

请参阅此SO 文章