title: difference between "&" and "and" in pandas
body: <p>I have some code that runs on a cron (via kubernetes) for several months now.</p>
  
  <p>Yesterday, part of my code didn't work that normally does:</p>
  
  <p>This statement, all of a sudden, wasnt 'True' (both df_temp and df_temp4 have data in them:</p>
  
  <pre><code>if ( len(df_temp &gt; 0) &amp; len(df_temp4 &gt; 0)):
      print "HERE"
  </code></pre>
  
  <p>however, this worked:</p>
  
  <pre><code>if ( len(df_temp &gt; 0) and len(df_temp4 &gt; 0)):
      print "HERE"
  </code></pre>
  
  <p>Was there some sort of code push that would cause this change? Since I've run this code for months, not sure what would cause this statement to fail all of a sudden.</p>