D:\desktop\我的项目> pip install --upgrade pip
Looking in indexes: https://mirrors.aliyun.com/pypi/simple/
Requirement already satisfied: pip in d:\pythonproject\python\lib\site-packages (23.3.2)
WARNING: 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.HTTPSConnection object at 0x000001E30562B6D0>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed'))': /pypi/simple/pip/
WARNING: 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.HTTPSConnection object at 0x000001E30562BD00>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed'))': /pypi/simple/pip/
WARNING: 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.HTTPSConnection object at 0x000001E30562BDC0>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed'))': /pypi/simple/pip/
WARNING: 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.HTTPSConnection object at 0x000001E30562BF40>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed'))': /pypi/simple/pip/
WARNING: 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.HTTPSConnection object at 0x000001E3056600A0>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed'))': /pypi/simple/pip/