title: Using "python --version" command bringing up error message
body: <p>I have Python 3.7.1 on my Windows 10 PC. I want to install Pandas and firstly need to do some checks to see if I have everything required. I tried typing the following to double check the Python version:</p>
  
  <pre><code>python --version
  </code></pre>
  
  <p>but it keeps spitting out the error:</p>
  
  <pre><code>Traceback (most recent call last):
      File "&lt;stdin&gt;", line 1, in &lt;module&gt;
  NameError: name 'python' is not defined
  </code></pre>
  
  <p>According to the Pandas website, if this error occurs it's because I need to type it into Python Shell. But that's what I'm doing... I know I'm probably missing something really obvious, but I'd really appreciate any hints and tips for this very basic problem...</p>
  
  <p>Thanks!</p>