python - pip 差错误 : 'module' object has no attribute 'Cryptography_HAS_SSL_ST'

Question

我尝试从 pip 安装并不断收到类似类型的错误。

$ pip install quandl
Traceback (most recent call last):
  File "/usr/bin/pip", line 9, in <module>
    load_entry_point('pip==1.5.6', 'console_scripts', 'pip')()
  File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 558, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2682, in load_entry_point
    return ep.load()
  File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2355, in load
    return self.resolve()
  File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2361, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python2.7/dist-packages/pip/__init__.py", line 74, in <module>
    from pip.vcs import git, mercurial, subversion, bazaar  # noqa
  File "/usr/lib/python2.7/dist-packages/pip/vcs/mercurial.py", line 9, in <module>
    from pip.download import path_to_url
  File "/usr/lib/python2.7/dist-packages/pip/download.py", line 22, in <module>
    import requests, six
  File "/usr/lib/python2.7/dist-packages/requests/__init__.py", line 53, in <module>
    from .packages.urllib3.contrib import pyopenssl
  File "/usr/lib/python2.7/dist-packages/urllib3/contrib/pyopenssl.py", line 53, in <module>
    import OpenSSL.SSL
  File "/home/ubuntu/.local/lib/python2.7/site-packages/OpenSSL/__init__.py", line 8, in <module>
    from OpenSSL import rand, crypto, SSL
  File "/home/ubuntu/.local/lib/python2.7/site-packages/OpenSSL/SSL.py", line 112, in <module>
    if _lib.Cryptography_HAS_SSL_ST:
AttributeError: 'module' object has no attribute 'Cryptography_HAS_SSL_ST'

现在，即使我尝试安装不同的 pip 模块，我也遇到了同样的错误。有什么解决方案吗？这是由于在下载 pip 模块时进程意外终止所致。

请帮助我完成纠正此错误的必要步骤。

我尝试安装这个

$ pip install -U cryptography
Traceback (most recent call last):
  File "/usr/bin/pip", line 9, in <module>
    load_entry_point('pip==1.5.6', 'console_scripts', 'pip')()
  File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 558, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2682, in load_entry_point
    return ep.load()
  File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2355, in load
    return self.resolve()
  File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2361, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python2.7/dist-packages/pip/__init__.py", line 74, in <module>
    from pip.vcs import git, mercurial, subversion, bazaar  # noqa
  File "/usr/lib/python2.7/dist-packages/pip/vcs/mercurial.py", line 9, in <module>
    from pip.download import path_to_url
  File "/usr/lib/python2.7/dist-packages/pip/download.py", line 22, in <module>
    import requests, six
  File "/usr/lib/python2.7/dist-packages/requests/__init__.py", line 53, in <module>
    from .packages.urllib3.contrib import pyopenssl
  File "/usr/lib/python2.7/dist-packages/urllib3/contrib/pyopenssl.py", line 53, in <module>
    import OpenSSL.SSL
  File "/home/ubuntu/.local/lib/python2.7/site-packages/OpenSSL/__init__.py", line 8, in <module>
    from OpenSSL import rand, crypto, SSL
  File "/home/ubuntu/.local/lib/python2.7/site-packages/OpenSSL/SSL.py", line 112, in <module>
    if _lib.Cryptography_HAS_SSL_ST:
AttributeError: 'module' object has no attribute 'Cryptography_HAS_SSL_ST'

Answer 1

这里是 Ubuntu 16.04.3:

我想我已经通过删除 python-openssl 包(及其依赖项)解决了这个问题:

apt-get --auto-remove remove python-openssl

然后用 pip 安装最新版本:

pip install pyOpenSSL

当然，如果你安装另一个依赖它的 apt 包，它会将它拉回来。我希望你从现在开始使用 pip 代替 apt 来做所有事情，应该没问题。

编辑:截至 2019 年 1 月，此问题似乎不再存在。