Set “difference()” method:

• The Python set is used to create the unordered collection of unique objects.

• The built-in “set()” function is used in Python to create the sets.

• The set difference operation is used to find the elements in a set that is not present in another set.

• The “difference ()” method in Python is used to perform the set difference operation between sets.

• Since the difference operation is not symmetric interchanging the operand sets will produce different results.

Syntax:

In Python, the “difference ()” method can be used to find the set difference of sets as follows:

set1.difference (set2)

Program:

#create the set set1 with three character type members

set1 = set(['d', 'e', 'f'])

#create the set set2 with five character type members

set2 = set(['a', 'b', 'c', 'd', 'e'])

#find the difference of set2 from set1

set3 = set2.difference(set1)

#display the difference set set3

print(set3)

Explanation:

In the above Python program,

• The first statement is to create the set “set1” with elements “d”, “e”, and “f”...

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Chapter 9, Problem 17SA

Chapter 9, Problem 19SA

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Chapter 9 Solutions

Starting Out with Python (4th Edition)

Ch. 9.1 - An element in a dictionary has two parts. What are...Ch. 9.1 - Which part of a dictionary element must be...Ch. 9.1 - Suppose ' start' : 1472 is an element in a...Ch. 9.1 - Suppose a dictionary named employee has been...Ch. 9.1 - What will the following code display? stuff = {1 :...Ch. 9.1 - Prob. 6CP Ch. 9.1 - Suppose a dictionary named inventory exists. What...Ch. 9.1 - What will the following code display? stuff = {1 :...Ch. 9.1 - What will the following code display? stuff = {1 :...Ch. 9.1 - What is the difference between the dictionary...

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Solution Summary: The author explains that the Python set is used to create the unordered collection of unique objects. The "difference ()" method in Python performs the set difference operation between sets.

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