title: Pandas read part of a delimited txt file
body: <p>So I have a txt file from the earthquake experiment machine output:</p>
  
  <pre><code>23      (-9.144,  2.7432,  0) [HybridDamper/Floor 1 Disp m,--,--] #ffffff
  24      (-4.572,  0,       0) #ffffff
  # End Node section
  ===
  # Begin Member section
  gl gr #eeeeee
  23 D1 yellow
  </code></pre>
  
  <p>So there is a # End Node section, ===, #Begin Member secion that separates two parts of the output.
  I want to create two dataframes, one for the above part, and the other one for the below part. </p>
  
  <p>Without manually edit the output file from machine (which is not easy when the structure is big), is it possible to let pandas recognize the part separator (e.g., these lines start from #, =) from the .txt file?</p>
  
  <p>Thank you guys!
  Best
  Shawn  </p>