title: Changes in import statement python3
body: <p>I don't understand the following from <a href="http://www.python.org/dev/peps/pep-0404/" rel="noreferrer">pep-0404</a></p>
  
  <blockquote>
    <p>In Python 3, implicit relative imports within packages are no longer
    available - only absolute imports and explicit relative imports are
    supported. In addition, star imports (e.g. from x import *) are only
    permitted in module level code.</p>
  </blockquote>
  
  <p>What is a relative import?
  In what other places star import was allowed in python2?
  Please explain with examples.</p>