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我的系统是ubuntu18.4，已经将python的默认版本改成3.6.9，但仍然报错，有没有解决办法
也来试试看可以升级不
怎么升级呀？我也是才注册
我的系统是ubuntu18.4，已经将python的默认版本改成3.6.9，但仍然报错，有没有解决办法