Created by: Aurelius84

PR types

Bug fixes

PR changes

APIs

Describe

Fix Python Version compatibility of dict.iteritems

• 【bug】dict.iteritems → six.iteritems(dict)

  • iteritems is removed in Python3.

• 【Perf】 dict.items → six.iteritems(dict)

  • items() will return a copied full list not a generator, this will take extra memory.
  • iteritems() will return a generator without extra memory.