python - 下载 OPENSSL 后 pip 显示错误

Question

pip 命令显示错误。 我从https://github.com/rajpaul/igotoeurope/blob/master/requirements.txt下载了库然后它开始显示 pip 错误。我尝试卸载 pip 命令并重新安装相同的命令，但它仍然不起作用。

回溯(最近一次调用最后一次): 文件“/usr/lib/python3/dist-packages/pip/_vendor/init.py”，第 33 行，位于供应商中 导入(vendored_name、globals()、locals()、level=0) ModuleNotFoundError:没有名为“pip._vendor.cachecontrol”的模块

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/bin/pip3", line 9, in <module>
    from pip import main
  File "/usr/lib/python3/dist-packages/pip/__init__.py", line 22, in <module>
    from pip._vendor.requests.packages.urllib3.exceptions import DependencyWarning

  File "/usr/lib/python3/dist-packages/pip/_vendor/__init__.py", line 64, in <module>
    vendored("cachecontrol")
  File "/usr/lib/python3/dist-packages/pip/_vendor/__init__.py", line 36, in vendored
    __import__(modulename, globals(), locals(), level=0)
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 656, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 626, in _load_backward_compatible
  File "/usr/share/python-wheels/CacheControl-0.11.7-py2.py3-none-any.whl/cachecontrol/__init__.py", line 9, in <module>
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 656, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 626, in _load_backward_compatible
  File "/usr/share/python-wheels/CacheControl-0.11.7-py2.py3-none-any.whl/cachecontrol/wrapper.py", line 1, in <module>
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 656, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 626, in _load_backward_compatible
  File "/usr/share/python-wheels/CacheControl-0.11.7-py2.py3-none-any.whl/cachecontrol/adapter.py", line 4, in <module>
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 656, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 626, in _load_backward_compatible
  File "/usr/share/python-wheels/requests-2.18.4-py2.py3-none-any.whl/requests/__init__.py", line 84, in <module>
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 656, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 626, in _load_backward_compatible
  File "/usr/share/python-wheels/urllib3-1.22-py2.py3-none-any.whl/urllib3/contrib/pyopenssl.py", line 46, in <module>
  File "/home/aaroosh/.local/lib/python3.6/site-packages/OpenSSL/__init__.py", line 8, in <module>
    from OpenSSL import rand, crypto, SSL
  File "/home/aaroosh/.local/lib/python3.6/site-packages/OpenSSL/rand.py", line 11, in <module>
    from OpenSSL._util import (
  File "/home/aaroosh/.local/lib/python3.6/site-packages/OpenSSL/_util.py", line 3, in <module>
    from cryptography.hazmat.bindings.openssl.binding import Binding
  File "/home/aaroosh/.local/lib/python3.6/site-packages/cryptography/hazmat/bindings/openssl/binding.py", line 13, in <module>
    from cryptography.hazmat.bindings._openssl import ffi, lib
AttributeError: module '_cffi_backend' has no attribute '_init_cffi_1_0_external_module'

Answer 1

我通过删除 OPENSSL 库解决了这个问题。