title: pass pip path to python or python path to pip when running install
body: <p>python.exe is version 3.6. I have installed python3.8 in another directory and it is searched later in the PATH order after python 3.6.</p>
  <p>When running <code>python3.8 -m pip install package_name</code>. Can one choose which pip is loaded when running that command.</p>
  <p>I have python3.8 installed but i can't rename it to python.exe because python.exe is already python 3.6. So when i just do <code>pip3.8 install package_name</code> it uses the python.exe(3.6 version) so i am unable to install the packages for the python 3.8 version.</p>