title: In Python, what is `sys.maxsize`?
body: <p>I assumed that this number ( <code>2^63 - 1</code> ) was the maximum value python could handle, or store as a variable. But these commands seem to be working fine:</p>
  <pre><code>&gt;&gt;&gt; sys.maxsize
  9223372036854775807
  &gt;&gt;&gt; a=sys.maxsize + 1
  &gt;&gt;&gt; a 
  9223372036854775808
  </code></pre>
  <p>So is there any significance at all? Can Python handle arbitrarily large numbers, if computation resoruces permitt?</p>
  <p>Note, here's the print-out of my version is:</p>
  <pre><code>&gt;&gt;&gt; sys.version
  3.5.2 |Anaconda custom (64-bit)| (default, Jul  5 2016, 11:41:13) [MSC v.1900 64 bit (AMD64)]'
  </code></pre>