在Ubuntu系统中安装Pythonpip时遇到错误的解决方案

E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/universe/d/distlib/python-distli... Size mismatch

E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/r/requests/python-requests_... Size mismatch

E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

尝试了sudo apt-get update
尝试了apt-get install --fix-missing
尝试了换源

都无法解决