title: compare 2 CSV files using Python
body: <p>I have 2 CSV files where employee ID is the primary key. In the new file there will be some changes like phone number or address change. I am trying to do with Dict compare. Please guide me.</p>
  <pre><code>Old file -&gt; 12345, Peter, 765 darwin BLVD, 326-967-4330
  New file -&gt; 12345, Peter, 765 darwin LLVD, 339-440-3330`
  </code></pre>
  <p>I want to compare both the files line by line using the emp ID.</p>