title: numpy.array.tofile() binary file looks "strange" in notepad++
body: <p>I am just wondering how the function actually stores the data. Because to me, it looks completely strange. Say I have the following code:</p>
  
  <pre><code>import numpy as np
  filename = "test.dat"
  print(filename)
  fileobj = open(filename, mode='wb')
  off = np.array([1, 300], dtype=np.int32)
  off.tofile(fileobj)
  fileobj.close()
  
  fileobj2 = open(filename, mode='rb')
  off = np.fromfile(fileobj2, dtype = np.int32)
  print(off)
  fileobj2.close()
  </code></pre>
  
  <p>Now I expect 8 bytes inside the file, where each element is represented by 4 bytes (and I could live with any endianness). However when I open up the file in a hex editor (used notepad++ with hex editor plugin) I get the following bytes:</p>
  
  <pre><code>01 00 C4 AC 00
  </code></pre>
  
  <p>5 bytes, and I have no idea at all what it represents. The first byte looks like it is the number, but then what follows is something weird, certainly not "300".</p>
  
  <p>Yet reloading shows the original array.</p>
  
  <p>Is this something I don't understand in python, or is it a problem in notepad++? - I notice the hex looks different if I select a different "encoding" (huh?). Also: Windows does report it being 8 bytes long.</p>