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使用 pip 安装 Python 包 - “Tornado 需要最新的 SSL 模块。”

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使用 pip 安装 Python 包 - “Tornado 需要最新的 SSL 模块。”

我正在尝试使用 pip 安装 Tornado Python 包，但出现此错误。我尝试将 Python 从 2.7.7 升级到 2.7.14，但仍然收到错误。我pip install --upgrade pip也尝试过。

pip 使用了错误的 Python 版本吗？

lx@LX ~ $ python -V
Python 2.7.14
lx@LX ~ $ pip -V
pip 1.5.4 from /usr/lib/python2.7/dist-packages (python 2.7)
lx@LX ~ $ pip install tornado
Downloading/unpacking tornado
  Downloading tornado-5.0.1.tar.gz (504kB): 504kB downloaded
  Running setup.py (path:/tmp/pip_build_lx/tornado/setup.py) egg_info for package tornado
    Traceback (most recent call last):
      File "<string>", line 17, in <module>
      File "/tmp/pip_build_lx/tornado/setup.py", line 146, in <module>
        raise ImportError("Tornado requires an up-to-date SSL module. This means "
    ImportError: Tornado requires an up-to-date SSL module. This means Python 2.7.9+ or 3.4+ (although some distributions have backported the necessary changes to older versions).
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):

  File "<string>", line 17, in <module>

  File "/tmp/pip_build_lx/tornado/setup.py", line 146, in <module>

    raise ImportError("Tornado requires an up-to-date SSL module. This means "

ImportError: Tornado requires an up-to-date SSL module. This means Python 2.7.9+ or 3.4+ (although some distributions have backported the necessary changes to older versions).

----------------------------------------
Cleaning up...
Command python setup.py egg_info failed with error code 1 in /tmp/pip_build_lx/tornado
Storing debug log for failure in /home/lx/.pip/pip.log

Python版本

lx@LX ~ $ python 
Python 2.7.14 (default, Mar 19 2018, 20:12:34) 
[GCC 4.8.4] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import ssl
>>> ssl
<module 'ssl' from '/usr/local/lib/python2.7/ssl.pyc'>
>>> quit()
lx@LX ~ $

答案1

通过再次安装 pip 修复

lx@LX ~/Downloads $ sudo python get-pip.py
[sudo] password for lx: 
The directory '/home/lx/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/home/lx/.cache/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Collecting pip
  Downloading pip-9.0.2-py2.py3-none-any.whl (1.4MB)
    100% |████████████████████████████████| 1.4MB 964kB/s 
Collecting setuptools
  Downloading setuptools-39.0.1-py2.py3-none-any.whl (569kB)
    100% |████████████████████████████████| 573kB 1.7MB/s 
Collecting wheel
  Downloading wheel-0.30.0-py2.py3-none-any.whl (49kB)
    100% |████████████████████████████████| 51kB 3.6MB/s 
Installing collected packages: pip, setuptools, wheel
Successfully installed pip-9.0.2 setuptools-39.0.1 wheel-0.30.0

现在使用正确的Python版本

lx@LX ~/Downloads $ pip -V
pip 9.0.2 from /usr/local/lib/python2.7/site-packages (python 2.7)

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