pip 安装报错的超时问题

WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by ‘ConnectTimeoutError(, ‘Connection to files.pythonhosted.org timed out. (connect timeout=15)’)’: /packages/b1/c0/54bb06dc4f3998a3b5e017a6356a7764fd91bba56cf744705ccb565239f0/torch-1.10.0-cp38-cp38-win_amd64.whl
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by ‘ConnectTimeoutError(, ‘Connection to files.pythonhosted.org timed out. (connect timeout=15)’)’: /packages/b1/c0/54bb06dc4f3998a3b5e017a6356a7764fd91bba56cf744705ccb565239f0/torch-1.10.0-cp38-cp38-win_amd64.whl
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by ‘ConnectTimeoutError(, ‘Connection to files.pythonhosted.org timed out. (connect timeout=15)’)’: /packages/b1/c0/54bb06dc4f3998a3b5e017a6356a7764fd91bba56cf744705ccb565239f0/torch-1.10.0-cp38-cp38-win_amd64.whl
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by ‘ConnectTimeoutError(, ‘Connection to files.pythonhosted.org timed out. (connect timeout=15)’)’: /packages/b1/c0/54bb06dc4f3998a3b5e017a6356a7764fd91bba56cf744705ccb565239f0/torch-1.10.0-cp38-cp38-win_amd64.whl
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by ‘ConnectTimeoutError(, ‘Connection to files.pythonhosted.org timed out. (connect timeout=15)’)’: /packages/b1/c0/54bb06dc4f3998a3b5e017a6356a7764fd91bba56cf744705ccb565239f0/torch-1.10.0-cp38-cp38-win_amd64.whl
ERROR: Could not install packages due to an OSError: HTTPSConnectionPool(host=‘files.pythonhosted.org’, port=443): Max retries exceeded with url: /packages/b1/c0/54bb06dc4f3998a3b5e017a6356a7764fd91bba56cf744705ccb565239f0/torch-1.10.0-cp38-cp38-win_amd64.whl (Caused by ConnectTimeoutError(, ‘Connection to files.pythonhosted.org timed out. (connect timeout=15)’))解决办法：在pip安装时
pip install xxx -i http://pypi.douban.com/simple --trusted-host pypi.douban.com，xxx为要安装的软件即可