注释掉：E:\anaconda\envs\TF_2C\Lib\site-packages\pip\_vendor\urllib3\response.py中的这两行：
#if brotli is not None:
# DECODER_ERROR_CLASSES += (brotli.error,)
然后去
https://www.lfd.uci.edu/~gohlke/pythonlibs/
下载：
解决： DECODER_ERROR_CLASSES += (brotli.error,) ttributeError: module 'brotli' has no attribute 'error'
原文：https://www.cnblogs.com/guofen3399/p/13626276.html