1.问题描述:ERROR: No matching distribution found for matplotlib>=3.2.2
WARNING: There was an error checking the latest version of pip.
Looking in indexes: https://pypi.tuna.tsinghua.edu.cn/simple
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot
connect to proxy.', OSError(0, 'Error'))': /simple/matplotlib/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot
connect to proxy.', OSError(0, 'Error'))': /simple/matplotlib/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot
connect to proxy.', OSError(0, 'Error'))': /simple/matplotlib/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot
connect to proxy.', OSError(0, 'Error'))': /simple/matplotlib/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot
connect to proxy.', OSError(0, 'Error'))': /simple/matplotlib/
ERROR: Could not find a version that satisfies the requirement matplotlib>=3.2.2 (from versions: none)
ERROR: No matching distribution found for matplotlib>=3.2.2
WARNING: There was an error checking the latest version of pip.
2.原因分析:我打开了代理服务器,这时我们使用的清华镜像源就不能使用了
3.解决办法:关闭代理服务器即可。