>pip install dlib-19.7.0-cp36-cp36m-win_amd64.whl

ERROR: dlib-19.7.0-cp36-cp36m-win_amd64.whl is not a supported wheel on this platform.

出现这个问题的原因是版本不匹配
查看本机python的版本匹配哪些文件

>>>python

Python 3.7.0 (default, Jun 28 2018, 08:04:48) [MSC v.1912 64 bit (AMD64)] :: Anaconda, Inc. on win32
Type “help”, “copyright”, “credits” or “license” for more information.

>>>import pip._internal.pep425tags

注意：导入的是 pip._internal.pep425tags
导入不完整会出现：AttributeError: module ‘pip._internal’ has no attribute ‘pep425tags’

>>>print(pip._internal.pep425tags.get_supported()) #显示支持版本

[<cp37-cp37m-win_amd64 @ 3101192656712>, <cp37-abi3-win_amd64 @ 3101192656904>, <cp37-none-win_amd64 @ 3101192657032>, <cp36-abi3-win_amd64 @ 3101192657160>, <cp35-abi3-win_amd64 @ 3101192657288>, <cp34-abi3-win_amd64 @ 3101192657416>, <cp33-abi3-win_amd64 @ 3101192657544>, <cp32-abi3-win_amd64 @ 3101192657672>, <py37-none-win_amd64 @ 3101192657864>, <py3-none-win_amd64 @ 3101192657992>, <py36-none-win_amd64 @ 3101192658120>, <py35-none-win_amd64 @ 3101192658248>, <py34-none-win_amd64 @ 3101192658376>, <py33-none-win_amd64 @ 3101192658504>, <py32-none-win_amd64 @ 3101192658632>, <py31-none-win_amd64 @ 3101192658760>, <py30-none-win_amd64 @ 3101192658888>, <cp37-none-any @ 3101192683656>, <py37-none-any @ 3101192683720>, <py3-none-any @ 3101192683784>, <py36-none-any @ 3101192683848>, <py35-none-any @ 3101192683912>, <py34-none-any @ 3101192683976>, <py33-none-any @ 3101192684040>, <py32-none-any @ 3101192684104>, <py31-none-any @ 3101192684168>, <py30-none-any @ 3101192684232

可以看到对应的版本是<cp37-cp37m-win_amd64 @ 3101192656712>
找对应的版本安装即可**下面附上链接（成功安装，放心使用）：
dlib python3.6

dlib python3.7