Python set symmetric_difference_update()
The symmetric difference of two sets is the set of elements which are in either of the sets but not in both of them.
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Symmetric Difference is marked in Green
symmetric_difference() method returns a new set which contains symmetric difference of two sets. The symmetric_difference_update() method updates the set calling symmetric_difference_update() with the symmetric difference of sets.
Syntax:
A.symmetric_difference_update(B)
Parameters:
The symmetric_difference takes a single “iterable” as an argument. Iterable should contain hashable object.
Returns:
This method returns None (which indicates absence of a return value). It only updates the set calling symmetric_difference_update() with the symmetric difference of sets.
CODE 1
Python
# Python code to demonstrate working of# symmetric_difference_update()A = {'p', 'a', 'w', 'a', 'n'}B = {'r', 'a', 'o', 'n', 'e'}# result is always none.result = A.symmetric_difference_update(B)print('A = ', A)print('B = ', B)print('result = ', result) |
Output:
('A = ', set(['e', 'o', 'p', 'r', 'w']))
('B = ', set(['a', 'r', 'e', 'o', 'n']))
('result = ', None)
CODE 2
Python
# Python code to demonstrate working of# symmetric_difference_update()A = {'s', 'u', 'n', 'n', 'y'}B = {'b', 'u', 'n', 'n', 'y'}# result is always none.result = A.symmetric_difference_update(B)print('A = ', A)print('B = ', B)print('result = ', result) |
Output:
('A = ', set(['s', 'b']))
('B = ', set(['y', 'b', 'u', 'n']))
('result = ', None)
CODE 3:
Python
# Python code to demonstrate working of# symmetric_difference_update()A = {1, 2, 3, 4, 5, 6}B = [4, 5, 7, 8]# passing argument as listA.symmetric_difference_update(B)print("A =", A)A = {2, 4, 6, 8}B = (i for i in range(2, 6))# passing argument as generator objectA.symmetric_difference_update(B)print("A=", A) |
('A =', set([1, 2, 3, 6, 7, 8]))
('A=', set([3, 5, 6, 8]))
CODE 4:
Python
# Python code to demonstrate working of# symmetric_difference_update()A = {1, 2, 3, 4, 5}B = [[1, 2, 3], 4, 5]# error as b contain one element as list(unhashable object)A.symmetric_difference_update(B)print("A =", A) |
Output
Traceback (most recent call last):
File "/home/1b4e24cadc3fabcd5f90141964a60e9b.py", line 9, in <module>
A.symmetric_difference_update(B)
TypeError: unhashable type: 'list'
