win10 pip ERROR: Could not find a version that satisfies the requirement

输入：

C:\WINDOWS\system32>pip --trusted-host=tsinghua.edu.cn install h5py

报错：

Looking in indexes: https://pypi.tuna.tsinghua.edu.cn/simple
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x00000221DDE0D070>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')': /simple/h5py/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x00000221DDE0D3A0>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')': /simple/h5py/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x00000221DDE0D4F0>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')': /simple/h5py/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x00000221DDE0D760>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')': /simple/h5py/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x00000221DDE0D820>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')': /simple/h5py/
ERROR: Could not find a version that satisfies the requirement h5py (from versions: none)
ERROR: No matching distribution found for h5py

可能的原因：没有设置代理

解决：

C:\WINDOWS\system32>set http_proxy=http://10.xxx.xxx.xxx:8080
C:\WINDOWS\system32>set https_proxy=https://10.xxx.xxx.xxx:8080
C:\WINDOWS\system32>pip --trusted-host=tsinghua.edu.cn install h5py --user