为什么“pip install tornado”没有安装tornado模块？

Question

我正在尝试将 tornado 安装到我的虚拟环境中，以便让 Jupyter 正常工作。我试过pip install tornado，它似乎在运行，但它只安装其他模块。我什至尝试卸载tornado然后尝试重新安装它，但由于它不存在，我什至无法卸载它。

有没有办法安装龙卷风以便我看到它？我觉得我什么都试过了。有什么建议吗？

Edit1：我应该提一下，更新 pip 没有任何作用。

下面的shell输出是我设置虚拟环境并激活它

[ec2-user@ip-172-31-51-121 ~]$ virtualenv venv
New python executable in venv/bin/python2.7
Also creating executable in venv/bin/python
Installing setuptools, pip...done.
[ec2-user@ip-172-31-51-121 ~]$ . venv/bin/activate

然后我们看一下用pip list安装的模块

(venv)[ec2-user@ip-172-31-51-121 ~]$ pip list
You are using pip version 6.0.8, however version 8.1.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
pip (6.0.8)
setuptools (12.0.5)

接下来，我们pip install tornado（并确保我们重新下载它以防它存在于缓存中）：

(venv)[ec2-user@ip-172-31-51-121 ~]$ pip install tornado --no-cache-dir
You are using pip version 6.0.8, however version 8.1.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
Collecting tornado
  Downloading tornado-4.3.tar.gz (450kB)
    100% |################################| 454kB 27.6MB/s
Collecting backports.ssl-match-hostname (from tornado)
  Downloading backports.ssl_match_hostname-3.5.0.1.tar.gz
Collecting singledispatch (from tornado)
  Downloading singledispatch-3.4.0.3-py2.py3-none-any.whl
Collecting certifi (from tornado)
  Downloading certifi-2016.2.28-py2.py3-none-any.whl (366kB)
    100% |################################| 368kB 28.2MB/s
Collecting backports-abc>=0.4 (from tornado)
  Downloading backports_abc-0.4-py2.py3-none-any.whl
Collecting six (from singledispatch->tornado)
  Downloading six-1.10.0-py2.py3-none-any.whl
Installing collected packages: six, backports-abc, certifi, singledispatch, backports.ssl-match-hostname, tornado




  Running setup.py install for backports.ssl-match-hostname
  Running setup.py install for tornado
    building 'tornado.speedups' extension
    gcc -pthread -fno-strict-aliasing -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -D_GNU_SOURCE -fPIC -fwrapv -DNDEBUG -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -D_GNU_SOURCE -fPIC -fwrapv -fPIC -I/usr/include/python2.7 -c tornado/speedups.c -o build/temp.linux-x86_64-2.7/tornado/speedups.o
    gcc -pthread -shared build/temp.linux-x86_64-2.7/tornado/speedups.o -L/usr/lib64 -lpython2.7 -o build/lib.linux-x86_64-2.7/tornado/speedups.so
Successfully installed backports-abc-0.4 backports.ssl-match-hostname-3.5.0.1 certifi-2016.2.28 singledispatch-3.4.0.3 six-1.10.0 tornado

使用pip list 进行双重检查，我们仍然没有看到tornado

(venv)[ec2-user@ip-172-31-51-121 ~]$ pip list
You are using pip version 6.0.8, however version 8.1.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
backports-abc (0.4)
backports.ssl-match-hostname (3.5.0.1)
certifi (2016.2.28)
pip (6.0.8)
setuptools (12.0.5)
singledispatch (3.4.0.3)
six (1.10.0)

当然，既然我们看不到它，我们也不能卸载它。

(venv)[ec2-user@ip-172-31-51-121 ~]$ pip uninstall tornado
You are using pip version 6.0.8, however version 8.1.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
Cannot uninstall requirement tornado, not installed

Answer 1

先升级你的点子， 试试这个

pip install -U wheel

或

pip install -U wheel
pip install tornado

For info visit github github issue link ，您也可以在这里提出问题。

Answer 2

我的猜测是您使用的是旧版本的 virtualenv，它不支持 Tornado 需要的 lib64。这应该在升级 virtualenv 时得到修复。