$ cd
$ mkdir tmp
$ cd tmp
$ wget https://www.python.org/ftp/python/3.6.5/Python-3.6.5.tgz
$ tar zxvf Python-3.6.5.tgz
$ cd Python-3.6.5
$ ./configure --prefix=$HOME/opt/python-3.6.5
$ make
$ make install
$ cd ~/opt/bin
$ ln -s ~/opt/python-3.6.5/bin/python3 python3
$ ln -s ~/opt/python-3.6.5/bin/pip3 pip3
3.8.2 has a problem
ModuleNotFoundError: No module named '_ctypes'
pip3 install --user --upgrade numpy scipy sympy matplotlib
install myalloy_pkg from Github:
pip3 install --user --upgrade git+https://github.com/BinglunYin/myalloy_package.git
or from a local folder:
pip3 install --user -e .