title: print memory address of Python variable
body: <p>How do I print the memory address of a variable in Python 2.7? 
  I know id() returns the 'id' of a variable or object, but this doesn't return the expected 0x3357e182 style I was expecting to see for a memory address. 
  I want to do something like <code>print &amp;x</code>, where x is a C++ int variable for example.
  How can I do this in Python?</p>