title: Pythonic way to access arbitrary element from dictionary
body: <p>I have a dictionary, full of items. I want to peek at a single, arbitrary item:</p>
  <pre><code>print(&quot;Amongst our dictionary's items are such diverse elements as: %s&quot; % arb(dictionary))
  </code></pre>
  <p>I don't care which item. It doesn't need to be <em>random</em>.</p>
  <p>I can think of many ways of implementing this, but they all seem wasteful. I am wondering if any are preferred idioms in Python, or (even better) if I am missing one.</p>
  <pre><code>def arb(dictionary):
  # Creates an entire list in memory. Could take a while.
      return list(dictionary.values())[0]
  
  def arb(dictionary):
  # Creates an entire iterator. An improvement.
      for item in dictionary.values():
          return item
  
  def arb(dictionary):
  # No iterator, but writes to the dictionary! Twice!
      key, value = dictionary.popitem()
      dictionary[key] = value
      return value
  </code></pre>
  <p>I'm in a position where the performance isn't critical enough that this matters (yet), so I can be accused of premature optimization, but I am trying to improve my Python coding style, so if there is an easily understood variant, it would be good to adopt it.</p>