title: TypeError: Non-Hexadecimal digit found when trying to convert from hex to string
body: <p>I have a file encoded in hex and I'm trying to decode the file however I keep getting a type error. I have only been using python on and off for a few weeks so if this seems like a basic question I apologize.</p>
  
  <p>The file contents is as follows:</p>
  
  <p><code>4647525137454353554e54544b5831375a42524d345742473246563639554e4a36495a3359304f35394843554637564d4d464f32354143574f495a4f4a4a565849373259544f46335a4358494b424e335047545a51534b47465259475956584d44594f473536494553373653455932574b33574431435a314d35545957594d4e57434444344948324d375858544f4c564f31444a45304947394c32375a584f4845535a534f43353859594c55594e4239363759393738313557475859345a474448434e4f5a5744544d696c6c656e69756d323030303a3035303233626566343737386639343461626439346334653364623062326166</code></p>
  
  <p>here is the code I ran:</p>
  
  <pre><code>"received_files/documents/cache/OCAGS0WFYO57JVFGUI4Z437.txt".decode("hex")
  </code></pre>
  
  <p>This is what I got back:</p>
  
  <pre class="lang-none prettyprint-override"><code>Traceback (most recent call last):
    File "converter.py", line 1, in &lt;module&gt;
      "received_files/documents/cache/OCAGS0WFYO57JVFGUI4Z437.txt".decode("hex")
    File "/usr/lib/python2.7/encodings/hex_codec.py", line 42, in hex_decode
      output = binascii.a2b_hex(input)
  TypeError: Non-hexadecimal digit found
  </code></pre>