title: How to import "dat" file including only certain strings in python
body: <p>I am trying to import several "dat" files to python spyder.</p>
  
  <p><a href="https://i.stack.imgur.com/6JCNb.png" rel="nofollow noreferrer">dat_file_list_images</a></p>
  
  <p>Here are dat files listed, and there are two types on the list ended with _1 and _2. I wanna import dat files ended with "_1" only. </p>
  
  <p>Is there any way to import them at once with one single loop? </p>
  
  <p>After I import them, I would like to aggregate all to one single matrix. </p>