title: How to fix NameError when running Python Script in Windows Command Prompt
body: <p>I ran a python file, named jbA.py in windows command prompt, with the following commands, orderly:</p>
  
  <ol>
  <li>python </li>
  <li>jbA.py</li>
  </ol>
  
  <p>It displays the following error:</p>
  
  <pre><code>Traceback (most recent call last): 
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
  NameError: name 'jbA' is not defined
  </code></pre>
  
  <p>Can anyone help to fix the above mentioned error? Thank you.</p>