title: Abbreviate the import of multiple files with loadtxt (Python)
body: <p>I wanna abbreviate the way I import multiples files with loadtxt, I do the next:</p>
  
  <pre><code>rc1    =loadtxt("20120701_Gp_xr_5m.txt", skiprows=19)
  rc2    =loadtxt("20120702_Gp_xr_5m.txt", skiprows=19)
  rc3    =loadtxt("20120703_Gp_xr_5m.txt", skiprows=19)
  rc4    =loadtxt("20120704_Gp_xr_5m.txt", skiprows=19)
  rc5    =loadtxt("20120705_Gp_xr_5m.txt", skiprows=19)
  rc6    =loadtxt("20120706_Gp_xr_5m.txt", skiprows=19)
  rc7    =loadtxt("20120707_Gp_xr_5m.txt", skiprows=19)
  rc8    =loadtxt("20120708_Gp_xr_5m.txt", skiprows=19)
  rc9    =loadtxt("20120709_Gp_xr_5m.txt", skiprows=19)
  rc10   =loadtxt("20120710_Gp_xr_5m.txt", skiprows=19)
  </code></pre>
  
  <p>Then I concatenate them using:</p>
  
  <pre><code>GOES   =concatenate((rc1,rc2,rc3,rc4,rc5,rc6,rc7,rc8,rc9,
                       rc10),axis=0)
  </code></pre>
  
  <p>But my question is: Do I wanna reduce all of this? Maybe with a FOR or something like that. Since the files are a secuence of dates (strings). </p>
  
  <p>I was thinking to do something like this</p>
  
  <p>day= #### i dont know how define a string going from 01 to 31 for example</p>
  
  <pre><code>data="201207"+day+"_Gp_xr_5m.txt"
  </code></pre>
  
  <p>Then do this, but i think is not correct</p>
  
  <pre><code>GOES=loadtxt(data, skiprows=19)
  </code></pre>