title: Iterating over accepted args of argparse
body: <p>I cant see m to figure out how to iterate over the <em>accepted</em> args of argparse.  I get I can iterate over the parsed_args result, but what I want is to iterate over the arguments the parser is configured with ( ie with optparse you can iterate over the args ).</p>
  
  <p>for example:</p>
  
  <pre><code>parser = argparse.ArgumentParser( prog = 'myapp' )
  parser.add_argument( '--a',  .. )
  parser.add_argument( '--b',  ...) 
  parser.add_argument( '--c',  ... )
  
  for arg in parser.args():
      print arg
  </code></pre>
  
  <p>would result in</p>
  
  <pre><code>--a
  --b
  --c
  </code></pre>