How can I add items to an empty set in python

Question

I have the following procedure:

def myProc(invIndex, keyWord):
    D={}
    for i in range(len(keyWord)):
        if keyWord[i] in invIndex.keys():
                      


        

Answer 1

D = {} is a dictionary not set.

>>> d = {}
>>> type(d)

Use D = set():

>>> d = set()
>>> type(d)

>>> d.update({1})
>>> d.add(2)
>>> d.update([3,3,3])
>>> d
set([1, 2, 3])