urllib3的pip安装挂在“由于etag进行缓存”上。我正在构建一个不允许您指定--no-cache-dir的AWS圣杯项目，因此我需要在没有该命令的情况下解决此问题。有任何想法吗？
在虚拟环境中使用Python 3.6.5和Pip 10.0.1。
(partnerdb-virtualenv) C:\Windows\SysWOW64\partnerdb-project>pip install urllib3 -vvv
Config variable 'Py_DEBUG' is unset, Python ABI tag may be incorrect
Config variable 'WITH_PYMALLOC' is unset, Python ABI tag may be incorrect
Created temporary directory: C:\Users\Matt\AppData\Local\Temp\pip-ephem-wheel-cache-v0e8ikpl
Created temporary directory: C:\Users\Matt\AppData\Local\Temp\pip-req-tracker-d58lw_h5
Created requirements tracker 'C:\\Users\\Matt\\AppData\\Local\\Temp\\pip-req-tracker-d58lw_h5'
Created temporary directory: C:\Users\Matt\AppData\Local\Temp\pip-install-6qpv92ms
Collecting urllib3
1 location(s) to search for versions of urllib3:
* https://pypi.org/simple/urllib3/
Getting page https://pypi.org/simple/urllib3/
Looking up "https://pypi.org/simple/urllib3/" in the cache
Request header has "max_age" as 0, cache bypassed
Starting new HTTPS connection …