Python: binascii.a2b_hex gives "Odd-length string"
<p>I have a hex value that I'm grabbing from a text file, then I'm passing it to a2b_hex to convert it to the proper binary representation.  Here is what I have:</p>

<pre><code>k = open('./' + basefile + '.key', 'r')
k1 = k.read()
k.close()
my_key = binascii.a2b_hex(k1)
</code></pre>

<p>When I print k1, it is as expected: 81e3d6df</p>

<p>Here is the error message:</p>

<pre><code>Traceback (most recent call last):
  File "xor.py", line 26, in &lt;module&gt;
    my_key = binascii.a2b_hex(k1)
TypeError: Odd-length string
</code></pre>

<p>Any suggestions?  Thanks!</p>
