title: Deferred evaluation in python
body: <p>I have heard of deferred evaluation in python (for example <a href="http://wiki.python.org/moin/AlternateLambdaSyntax" rel="noreferrer">here</a>), is it just referring to how lambdas are evaluated by the interpreter only when they are used? Or is this the proper term for describing how, due to python's dynamic design, it will not catch many errors until runtime?</p>
  
  <p>Or am I missing something entirely?</p>