Install pyenv, see:
https://python-forum.io/Thread-pyenv-Sim...ight=pyenv
then you can install any version in:
Available versions:
2.1.3
2.2.3
2.3.7
2.4.0
2.4.1
2.4.2
2.4.3
2.4.4
2.4.5
2.4.6
2.5.0
2.5.1
2.5.2
2.5.3
2.5.4
2.5.5
2.5.6
2.6.6
2.6.7
2.6.8
2.6.9
2.7.0
2.7-dev
2.7.1
2.7.2
2.7.3
2.7.4
2.7.5
2.7.6
2.7.7
2.7.8
2.7.9
2.7.10
2.7.11
2.7.12
2.7.13
2.7.14
2.7.15
2.7.16
3.0.1
3.1.0
3.1.1
3.1.2
3.1.3
3.1.4
3.1.5
3.2.0
3.2.1
3.2.2
3.2.3
3.2.4
3.2.5
3.2.6
3.3.0
3.3.1
3.3.2
3.3.3
3.3.4
3.3.5
3.3.6
3.3.7
3.4.0
3.4-dev
3.4.1
3.4.2
3.4.3
3.4.4
3.4.5
3.4.6
3.4.7
3.4.8
3.4.9
3.4.10
3.5.0
3.5-dev
3.5.1
3.5.2
3.5.3
3.5.4
3.5.5
3.5.6
3.5.7
3.6.0
3.6-dev
3.6.1
3.6.2
3.6.3
3.6.4
3.6.5
3.6.6
3.6.7
3.6.8
3.7.0
3.7-dev
3.7.1
3.7.2
3.7.3
3.8-dev
activepython-2.7.14
activepython-3.5.4
activepython-3.6.0
anaconda-1.4.0
anaconda-1.5.0
anaconda-1.5.1
anaconda-1.6.0
anaconda-1.6.1
anaconda-1.7.0
anaconda-1.8.0
anaconda-1.9.0
anaconda-1.9.1
anaconda-1.9.2
anaconda-2.0.0
anaconda-2.0.1
anaconda-2.1.0
anaconda-2.2.0
anaconda-2.3.0
anaconda-2.4.0
anaconda-4.0.0
anaconda2-2.4.0
anaconda2-2.4.1
anaconda2-2.5.0
anaconda2-4.0.0
anaconda2-4.1.0
anaconda2-4.1.1
anaconda2-4.2.0
anaconda2-4.3.0
anaconda2-4.3.1
anaconda2-4.4.0
anaconda2-5.0.0
anaconda2-5.0.1
anaconda2-5.1.0
anaconda2-5.2.0
anaconda2-5.3.0
anaconda2-5.3.1
anaconda2-2018.12
anaconda2-2019.03
anaconda3-2.0.0
anaconda3-2.0.1
anaconda3-2.1.0
anaconda3-2.2.0
anaconda3-2.3.0
anaconda3-2.4.0
anaconda3-2.4.1
anaconda3-2.5.0
anaconda3-4.0.0
anaconda3-4.1.0
anaconda3-4.1.1
anaconda3-4.2.0
anaconda3-4.3.0
anaconda3-4.3.1
anaconda3-4.4.0
anaconda3-5.0.0
anaconda3-5.0.1
anaconda3-5.1.0
anaconda3-5.2.0
anaconda3-5.3.0
anaconda3-5.3.1
anaconda3-2018.12
anaconda3-2019.03
ironpython-dev
ironpython-2.7.4
ironpython-2.7.5
ironpython-2.7.6.3
ironpython-2.7.7
jython-dev
jython-2.5.0
jython-2.5-dev
jython-2.5.1
jython-2.5.2
jython-2.5.3
jython-2.5.4-rc1
jython-2.7.0
jython-2.7.1
micropython-dev
micropython-1.9.3
micropython-1.9.4
micropython-1.10
miniconda-latest
miniconda-2.2.2
miniconda-3.0.0
miniconda-3.0.4
miniconda-3.0.5
miniconda-3.3.0
miniconda-3.4.2
miniconda-3.7.0
miniconda-3.8.3
miniconda-3.9.1
miniconda-3.10.1
miniconda-3.16.0
miniconda-3.18.3
miniconda2-latest
miniconda2-3.18.3
miniconda2-3.19.0
miniconda2-4.0.5
miniconda2-4.1.11
miniconda2-4.3.14
miniconda2-4.3.21
miniconda2-4.3.27
miniconda2-4.3.30
miniconda3-latest
miniconda3-2.2.2
miniconda3-3.0.0
miniconda3-3.0.4
miniconda3-3.0.5
miniconda3-3.3.0
miniconda3-3.4.2
miniconda3-3.7.0
miniconda3-3.8.3
miniconda3-3.9.1
miniconda3-3.10.1
miniconda3-3.16.0
miniconda3-3.18.3
miniconda3-3.19.0
miniconda3-4.0.5
miniconda3-4.1.11
miniconda3-4.2.12
miniconda3-4.3.11
miniconda3-4.3.14
miniconda3-4.3.21
miniconda3-4.3.27
miniconda3-4.3.30
pypy-c-jit-latest
pypy-c-nojit-latest
pypy-dev
pypy-stm-2.3
pypy-stm-2.5.1
pypy-1.5-src
pypy-1.5
pypy-1.6
pypy-1.7
pypy-1.8
pypy-1.9
pypy-2.0-src
pypy-2.0
pypy-2.0.1-src
pypy-2.0.1
pypy-2.0.2-src
pypy-2.0.2
pypy-2.1-src
pypy-2.1
pypy-2.2-src
pypy-2.2
pypy-2.2.1-src
pypy-2.2.1
pypy-2.3-src
pypy-2.3
pypy-2.3.1-src
pypy-2.3.1
pypy-2.4.0-src
pypy-2.4.0
pypy-2.5.0-src
pypy-2.5.0
pypy-2.5.1-src
pypy-2.5.1
pypy-2.6.0-src
pypy-2.6.0
pypy-2.6.1-src
pypy-2.6.1
pypy-4.0.0-src
pypy-4.0.0
pypy-4.0.1-src
pypy-4.0.1
pypy-5.0.0-src
pypy-5.0.0
pypy-5.0.1-src
pypy-5.0.1
pypy-5.1-src
pypy-5.1
pypy-5.1.1-src
pypy-5.1.1
pypy-5.3-src
pypy-5.3
pypy-5.3.1-src
pypy-5.3.1
pypy-5.4-src
pypy-5.4
pypy-5.4.1-src
pypy-5.4.1
pypy-5.6.0-src
pypy-5.6.0
pypy-5.7.0-src
pypy-5.7.0
pypy-5.7.1-src
pypy-5.7.1
pypy2-5.3-src
pypy2-5.3
pypy2-5.3.1-src
pypy2-5.3.1
pypy2-5.4-src
pypy2-5.4
pypy2-5.4.1-src
pypy2-5.4.1
pypy2-5.6.0-src
pypy2-5.6.0
pypy2-5.7.0-src
pypy2-5.7.0
pypy2-5.7.1-src
pypy2-5.7.1
pypy2.7-5.8.0-src
pypy2.7-5.8.0
pypy2.7-5.9.0-src
pypy2.7-5.9.0
pypy2.7-5.10.0-src
pypy2.7-5.10.0
pypy2.7-6.0.0-src
pypy2.7-6.0.0
pypy2.7-7.0.0-src
pypy2.7-7.0.0
pypy2.7-7.1.0-src
pypy2.7-7.1.0
pypy3-dev
pypy3-2.3.1-src
pypy3-2.3.1
pypy3-2.4.0-src
pypy3-2.4.0
pypy3.3-5.2-alpha1-src
pypy3.3-5.2-alpha1
pypy3.3-5.5-alpha-src
pypy3.3-5.5-alpha
pypy3.5-c-jit-latest
pypy3.5-5.7-beta-src
pypy3.5-5.7-beta
pypy3.5-5.7.1-beta-src
pypy3.5-5.7.1-beta
pypy3.5-5.8.0-src
pypy3.5-5.8.0
pypy3.5-5.9.0-src
pypy3.5-5.9.0
pypy3.5-5.10.0-src
pypy3.5-5.10.0
pypy3.5-5.10.1-src
pypy3.5-5.10.1
pypy3.5-6.0.0-src
pypy3.5-6.0.0
pypy3.5-7.0.0-src
pypy3.5-7.0.0
pypy3.6-7.0.0-src
pypy3.6-7.0.0
pypy3.6-7.1.0-src
pypy3.6-7.1.0
pyston-0.5.1
pyston-0.6.0
pyston-0.6.1
stackless-dev
stackless-2.7-dev
stackless-2.7.2
stackless-2.7.3
stackless-2.7.4
stackless-2.7.5
stackless-2.7.6
stackless-2.7.7
stackless-2.7.8
stackless-2.7.9
stackless-2.7.10
stackless-2.7.11
stackless-2.7.12
stackless-2.7.14
stackless-3.2.2
stackless-3.2.5
stackless-3.3.5
stackless-3.3.7
stackless-3.4-dev
stackless-3.4.1
stackless-3.4.2
stackless-3.4.7
stackless-3.5.4
