title: How do I test if Python is installed on Windows (10), and run an exe to install it if its not installed?
body: <p>I need to run the 2nd command on windows cmd only if the 1st one fails, 
  in another scneario, I want to open python setup after checking if it is installed or not.</p>
  
  <p>I used this command </p>
  
  <p><code>python --version || path/to/python_install.exe</code></p>
  
  <p>as I know the || means run if the last command failed. 
  but it only runs the first one. </p>