没想到换个地方配置环境还能解锁新的报错！不愧是你Anaconda！
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', timeout('_ssl.c:1074: The handshake operation timed out'))': /pypi/simple/tensorflow-cpu/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', timeout('_ssl.c:1074: The handshake operation timed out'))': /pypi/simple/tensorflow-cpu/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', timeout('_ssl.c:1074: The handshake operation timed out'))': /pypi/simple/tensorflow-cpu/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', timeout('_ssl.c:1074: The handshake operation timed out'))': /pypi/simple/tensorflow-cpu/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', timeout('_ssl.c:1074: The handshake operation timed out'))': /pypi/simple/tensorflow-cpu/
ERROR: Could not find a version that satisfies the requirement tensorflow-cpu==2.1.0
ERROR: No matching distribution found for tensorflow-cpu==2.1.0
参考：
https://blog.csdn.net/lsf_007/article/details/87931823
pip install matplotlib -i http://pypi.douban.com/simple --trusted-host pypi.douban.com
pip install tensorflow-cpu==2.1.0 -i http://pypi.douban.com/simple --trusted-host pypi.douban.com
=》pip install 要安装的模块名 -i http://pypi.douban.com/simple --trusted-host pypi.douban.com
我好傻，我刚刚老觉得tkinter得安装......
Original: https://blog.csdn.net/Karen_Yu_/article/details/115531321
Author: Karen_Yu_
Title: WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None))