使用命令提示符安装django

Question

Collecting django==2.2
      Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x038A4EF0>: Failed to establish a new connection: [Errno 11002] getaddrinfo failed'))': /simple/django/
      Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x038A42D0>: Failed to establish a new connection: [Errno 11002] getaddrinfo failed'))': /simple/django/
      Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x038C2530>: Failed to establish a new connection: [Errno 11002] getaddrinfo failed'))': /simple/django/
      Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x038C2730>: Failed to establish a new connection: [Errno 11002] getaddrinfo failed'))': /simple/django/
      Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x038C2690>: Failed to establish a new connection: [Errno 11002] getaddrinfo failed'))': /simple/django/
      Could not find a version that satisfies the requirement django==2.2 (from versions: )
    No matching distribution found for django==2.2

set http_proxy=http://username:password@proxyserver:proxyport

set https_proxy=https://username:password@proxyserver:proxyport