ubuntu 报错信息和解决方法

·当在ununtu 子系统中安装 pip (sudo apt-get install python3-pip) 时报错：

    Reading package lists... Done

    uilding dependency tree       

    Reading state information... Done

    E: Unable to locate package ****

    解决：

    更新apt库:

        sudo apt-get update

        sudo apt-get upgrade

·安装cython 时报错:

     WARNING: The scripts cygdb, cython and cythonize are installed in '/home/xiaowei/.local/bin' which is not on PATH.

  Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.

    解决:

    pip3 install --user cython

    或:

     sudo pip install Cython --install-option="--no-cython-compile"