尝试使用以下命令pip install tornado在适用于Python 3.6 64位的Win10 VS2017上安装Tornado，并出现以下错误：
----- Installing 'pip install tornado' -----
Requirement already up-to-date: pip in c:\program files (x86)\microsoft visual studio\shared\python36_64\lib\site-packages (18.0)
Collecting install
Could not find a version that satisfies the requirement install (from versions: )
No matching distribution found for install
----- Failed to install 'pip install tornado' -----
我也尝试下载Git zip并使用此命令pip install -Iv https://files.pythonhosted.org/packages/e6/78/6e7b5af12c12bdf38ca9bfe863fcaf53dc10430a312d0324e76c1e5ca426/tornado-5.1.1.tar.gz
（如此处引用：Installing specific package versions with pip）
http://www.tornadoweb.org/en/stable/显示
Tornado 5.x在Python 2.7和3.4+上运行
我也尝试了pip install --user tornado，如此处引用的：Tornado Install Issue
所有选项最终都出现相同的最终错误：安装失败。
我猜测它与此有关：(from versions: )，但我对pip / python还是陌生的
按照hoefling的要求尝试pip install -vvv …（输出中还有更多内容
No matching distribution found for install
Exception information:
Traceback (most recent call last):
File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python36_64\lib\site-packages\pip\_internal\basecommand.py", line 141, in main
status = self.run(options, args)
File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python36_64\lib\site-packages\pip\_internal\commands\install.py", line 299, in run
resolver.resolve(requirement_set)
File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python36_64\lib\site-packages\pip\_internal\resolve.py", line 102, in resolve
self._resolve_one(requirement_set, req)
File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python36_64\lib\site-packages\pip\_internal\resolve.py", line 256, in _resolve_one
abstract_dist = self._get_abstract_dist_for(req_to_install)
File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python36_64\lib\site-packages\pip\_internal\resolve.py", line 209, in _get_abstract_dist_for
self.require_hashes
File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python36_64\lib\site-packages\pip\_internal\operations\prepare.py", line 218, in prepare_linked_requirement
req.populate_link(finder, upgrade_allowed, require_hashes)
File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python36_64\lib\site-packages\pip\_internal\req\req_install.py", line 308, in populate_link
self.link = finder.find_requirement(self, upgrade)
File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python36_64\lib\site-packages\pip\_internal\index.py", line 543, in find_requirement
'No matching distribution found for %s' % req
pip._internal.exceptions.DistributionNotFound: No matching distribution found for install
----- Failed to install 'pip install -vvv https://files.pythonhosted.org/packages/ab/0e/8ec7ed219cb35fffe2f2cddbfa02b47ba5d23dd9026a41b3f2bdd63cdec3/tornado-5.1.1-cp36-cp36m-win_amd64.whl' -----
答案 0 :(得分：0)
我重新进行RTM，并注意到
除了pip或setup.py install将自动安装的要求之外，以下可选软件包可能也很有用。...
因此，我下载了稳定的zip，提取并运行：
"C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python36_64\python.exe" setup.py install，它就像一种魅力。
我对pip或python的方法还不很了解，因此不知道为什么这种方法有效，而其他方法却没有。