title: kwargs reserved word in python. What does it mean?
body: <p>I am using Python trying to figure out a key word and I see the word, "<code>kwargs</code>", which I know is some kind of argument in the called function but I can not find what it means or stands for anywhere.  </p>
  
  <p>For example, this entry in the Python documents says...</p>
  
  <pre><code>read_holding_registers(address, count=1, **kwargs)
  </code></pre>
  
  <h3>Parameters:</h3>
  
  <pre><code>address – The starting address to read from
  count – The number of registers to read
  unit – The slave unit this request is targeting
  </code></pre>
  
  <p>It looks like a reference to a pointer to pointer but that is all I
  can tell...</p>
  
  <p>This does NOT even use "<code>**kwargs</code>"  in the parameters list   It uses
  what looks to me like, "<code>unit</code>" instead of "<code>kwargs</code>".</p>
  
  <p>I can NOT seem to find anywhere what <code>kwargs</code> means.</p>
  
  <p>Maybe it is "Key Word arguments" ?  What am I missing here ?</p>
  
  <p>Any ideas on help here ?
  thank you !
  boB</p>