ANSWER THE FOLLOWING QUESTION IN PYTHON AND PUT THE ANSWER IN THE ORGINAL QUESTION WHERE IT IS SUPPOSED TO BE !

1.

#!/usr/bin/python3

import unittest

# --------------------------------------------------------------

# Return the list of totals

# --------------------------------------------------------------

def totals(L):

'''

Assume that L is a list of pairs (item, weight).

An item may occur multiple times in L.

Return a list R with the values totaled for each item, so

an item does not occur multiple times in R, but rather once with its total.

CONSTRAINT: YOU MUST USE A DICTIONARY

For example,

totals([('item2', 2)]) returns [('item2', 2)]

totals([('item2', 2), ('item2', 5)]) returns [('item2', 7)]

totals([('item2',2),('item1',3),('item2',2)]) => [('item1',3),('item2',4)]

(Note that the order of the items in the returned list does not matter.)

'''

pass

# --------------------------------------------------------------

# The Testing

# --------------------------------------------------------------

class myTests(unittest.TestCase):

def test0(self):

self.assertEqual(totals([]), [])

def test1(self):

self.assertEqual(totals([('item1',3)]), [('item1',3)])

def test2(self):

self.assertEqual(sorted(totals([('item1',3),('item2',2)])), [('item1',3),('item2',2)])

def test3(self):

self.assertEqual(sorted(totals([('item2',2),('item1',3),('item2',2)])),[('item1',3),('item2',4)])

if __name__=='__main__':

unittest.main(exit=True)