title: Python Check existing value row by row from the Data Frame using Pandas
body: <p>Is there any ways to using pandas checking the existing value row by row ?</p>
  
  <p>This how  my Data Frame looks like</p>
  
  <p><strong>Data Frame</strong></p>
  
  <pre><code>Log ID       User ID       Name       Phone Number     
  1            001           Jack       123456789
  2            002           Jackie     123456780
  3            003           Jacky      123456700
  4            004           Ben        123456000
  </code></pre>
  
  <p>The data I want to check is (Jacky, 123456700) is it in the Data Frame or not.</p>
  
  <p>If exist then I just ignore this data else insert into the Data Frame</p>