As you are in python3 , use dict.items() instead of dict.iteritems()
iteritems() was removed in python3, so you can’t use this method anymore.
Take a look at Python 3.0 Wiki Built-in Changes section, where it is stated:
Removed dict.iteritems(), dict.iterkeys(), and dict.itervalues().
Instead: use dict.items(), dict.keys(), and dict.values()
respectively.
In Python2, we had .items() and .iteritems() in dictionaries. dict.items() returned list of tuples in dictionary [(k1,v1),(k2,v2),…]. It copied all tuples in dictionary and created new list. If dictionary is very big, there is very big memory impact.
So they created dict.iteritems() in later versions of Python2. This returned iterator object. Whole dictionary was not copied so there is lesser memory consumption. People using Python2 are taught to use dict.iteritems() instead of .items() for efficiency as explained in following code.
import timeit
d = {i:i*2 for i in xrange(10000000)}
start = timeit.default_timer()
for key,value in d.items():
tmp = key + value #do something like print
t1 = timeit.default_timer() – start
start = timeit.default_timer()
for key,value in d.iteritems():
tmp = key + value
t2 = timeit.default_timer() – start
Output:
Time with d.items(): 9.04773592949
Time with d.iteritems(): 2.17707300186
In Python3, they wanted to make it more efficient, so moved dictionary.iteritems() to dict.items(), and removed .iteritems() as it was no longer needed.
You have used dict.iteritems() in Python3 so it has failed. Try using dict.items() which has the same functionality as dict.iteritems() of Python2. This is a tiny bit migration issue from Python2 to Python3.