Python Set | difference()
The difference between the two sets in Python is equal to the difference between the number of elements in two sets. The function difference() returns a set that is the difference between two sets. Let’s try to find out what will be the difference between two sets A and B. Then (set A – set B) will be the elements present in set A but not in B and (set B – set A) will be the elements present in set B but not in set A.
Example:
set A = {10, 20, 30, 40, 80}
set B = {100, 30, 80, 40, 60}
set A - set B = {10, 20}
set B - set A = {100, 60}
Explanation: A - B is equal to the elements present in A but not in B
B - A is equal to the elements present in B but not in A
Let’s look at the Venn diagram of the following difference set function.
Syntax:
set_A.difference(set_B) for (A - B) set _B.difference(set_A) for (B - A)
In this program, we will try to find out the difference between two sets set_A and set_B, both the way:
# Python code to get the difference between two sets # using difference() between set A and set B # Driver Code A = {10, 20, 30, 40, 80} B = {100, 30, 80, 40, 60} print (A.difference(B)) print (B.difference(A)) |
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Output:
{10, 20}
{100, 60}
We can also use – operator to find the difference between two sets.
# Python code to get the difference between two sets # using difference() between set A and set B # Driver Code A = {10, 20, 30, 40, 80} B = {100, 30, 80, 40, 60} print (A - B) print (B - A) |
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Output:
{10, 20}
{100, 60}
If we have equal sets then it will return the null set.
# Python code to get the difference between two sets # using difference() between set A and set B # Driver Code A = {10, 20, 30, 40, 80} B = {10, 20, 30, 40, 80, 100} print (A - B) |
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Output:
set()
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