difference_update() method update the main set with difference elements of the sets

difference_update() method in Python set

All set methods

Update the main set with difference elements only ( after removing common elements ).

Using difference_update() method

A={'a','b','c'}
B={'a','y','z'}
A.difference_update(B)
print(A)

Output

{'c','b'}

We can use any number of sets with difference_update()

A={'a','b','c'}
B={'a','y','z'}
C={'a','c','l'}
A.difference_update(B,C)
print(A)

Output

{'b'}

Using string ( iterable object ) with difference_update() method

A={'a','b','c','x','y'}
B='Alex'
A.difference_update(B)
print(A)

Output

{'c', 'y', 'a', 'b'}

Using list with difference_update() method.

A={'a','b','c'}
B=['a','x','y']
A.difference_update(B)
print(A)

Output

{'c', 'b'}

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