ModuleNotFoundError: No module n

pip install -i https://pypi.tuna.tsinghua.edu.cn/simple --upgrade numba
pip install -i https://pypi.tuna.tsinghua.edu.cn/simple llvmlite==0.31.0
pip install -i https://pypi.tuna.tsinghua.edu.cn/simple --ignore-installed llvmlite

pip install -i https://pypi.tuna.tsinghua.edu.cn/simple numba --ignore-installed llvmlite

还是拒绝访问。
在任务管理器把python的进程关掉，再删除D:\Anaconda3\Lib\site-packages底下llvmlite文件夹
再pip install -i https://pypi.tuna.tsinghua.edu.cn/simple numba --ignore-installed llvmlite

pip install -i https://pypi.tuna.tsinghua.edu.cn/simple --upgrade PyHamcrest
成功升级后再装numba
可以了