安装好YouCompleteMe后报错RequestsDependencyWarning: Old version of cryptography，Error detected 35_Pyeval

最新推荐文章于 2023-07-13 14:35:30 发布

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本文详细记录了在安装YouCompleteMe过程中遇到的错误及解决方法，包括更新cryptography和pyOpenSSL模块，以及如何正确配置vimrc文件，确保YouCompleteMe与Python2.7兼容。

安装YouCompleteMe后报错。

".vimrc" 95L, 3653C
Error detected while processing function <SNR>35_PollServerReady[7]..<SNR>35_Pyeval:
line    4:
/home/lenovo/.vim/bundle/YouCompleteMe/third_party/requests_deps/requests/requests/__init__.py:83: RequestsDependencyWarning: Old versi
on of cryptography ([1, 2, 3]) may cause slowdown.

解决方法

安装python2.7的pip包管理器，用python2.7升级一下cryptography，就是这里，我习惯性用了pip3，所以浪费了好一会，记住是python2.7的pip。

sudo apt install python-pip
sudo pip install --upgrade cryptography

vim ~/.vimrc
# 在vimrc加入下面这行代码告诉vim，ycm用的是python2.7
let g:ycm_server_python_interpreter = '/usr/bin/python2.7'

退出编辑，执行source命令重新加载一下vimrc，source ~/.vimrc

又报其他error

Error detected while processing function <SNR>27_RestartServer:
line    3:
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/lenovo/.vim/bundle/YouCompleteMe/python/ycm/youcompleteme.py", line 291, in RestartServer
    self._ShutdownServer()
  File "/home/lenovo/.vim/bundle/YouCompleteMe/python/ycm/youcompleteme.py", line 286, in _ShutdownServer
    SendShutdownRequest()
  File "/home/lenovo/.vim/bundle/YouCompleteMe/python/ycm/client/shutdown_request.py", line 45, in SendShutdownRequest
    request.Start()
  File "/home/lenovo/.vim/bundle/YouCompleteMe/python/ycm/client/shutdown_request.py", line 39, in Start
    display_message = False )
  File "/home/lenovo/.vim/bundle/YouCompleteMe/python/ycm/client/base_request.py", line 138, in PostDataToHandler
    BaseRequest.PostDataToHandlerAsync( data, handler, timeout ),
  File "/home/lenovo/.vim/bundle/YouCompleteMe/python/ycm/client/base_request.py", line 148, in PostDataToHandlerAsync
    return BaseRequest._TalkToHandlerAsync( data, handler, 'POST', timeout )
  File "/home/lenovo/.vim/bundle/YouCompleteMe/python/ycm/client/base_request.py", line 169, in _TalkToHandlerAsync
    return BaseRequest.Session().post(
  File "/home/lenovo/.vim/bundle/YouCompleteMe/python/ycm/client/base_request.py", line 217, in Session
    from requests_futures.sessions import FuturesSession
  File "/home/lenovo/.vim/bundle/YouCompleteMe/third_party/requests-futures/requests_futures/sessions.py", line 24, in <module>
    from requests import Session
  File "/home/lenovo/.vim/bundle/YouCompleteMe/third_party/requests_deps/requests/requests/__init__.py", line 95, in <module>
    from urllib3.contrib import pyopenssl
  File "/home/lenovo/.vim/bundle/YouCompleteMe/third_party/requests_deps/urllib3/src/urllib3/contrib/pyopenssl.py", line 46, in <module
>
    import OpenSSL.SSL
  File "/usr/lib/python2.7/dist-packages/OpenSSL/__init__.py", line 8, in <module>
    from OpenSSL import rand, crypto, SSL
  File "/usr/lib/python2.7/dist-packages/OpenSSL/SSL.py", line 118, in <module>
    SSL_ST_INIT = _lib.SSL_ST_INIT
AttributeError: 'module' object has no attribute 'SSL_ST_INIT'

又一个模块升级一下
sudo python -m easy_install --upgrade pyOpenSSL

原因分析

安装YouCompleteMe的时候我用的是python3 ./install.py安装的，也就是用的python3，但是ycm的内核使用python2编译的，所以我就得好像也看到有过这样一条报错。
YCM core library compiled for Python 2 but loaded in Python 3
所以里面有很多python2和python3的移植有点问题，解决办法就是指定YCM使用python2.7。