Example 1: python subtract one set from another
# Basic syntax:
difference_of_sets = set_1 - set_2
# Example usage:
# Define sets
set_1 = {3, 7, 11, 23, 42}
set_2 = {1, 2, 11, 42, 57}
# Return elements of set_1 that aren't in set_2:
difference_of_sets = set_1 - set_2
print(difference_of_sets)
--> {3, 23, 7}
# Syntax for other set functions:
set_1 | set_2 # Union of sets (elements in both)
set_1 & set_2 # Intersection of sets (elements in common)
Example 2: difference of two set in python
x = {1, 2, 3, 4, 5, 6}
y = {1, 2, 3, 4}
z = x.difference(y)
# 5, 6
Example 3: set except python
# Program to perform different set operations
# as we do in mathematics
# sets are define
A = {0, 2, 4, 6, 8};
B = {1, 2, 3, 4, 5};
# union
print("Union :", A | B)
# intersection
print("Intersection :", A & B)
# difference
print("Difference :", A - B)
# symmetric difference
print("Symmetric difference :", A ^ B)
Example 4: unique element intersection python
#get name1 and name2 as a list input
name1 =list("".join(str(x)for x in input("Enter name1").replace(" ","")))
name2 =list("".join(str(x)for x in input("Enter name2").replace(" ","")))
#check using list comprehension if x in name1 is in name2
#this will return multiple instances of the same character from name1 that matches with the name2
common = [x for x in name1 if x in name2]
#create a set out of the output so as to have only unique values of the repeated characters
unique = set(common)
#thus the above set will have common unrepeated characters from both names
#create a variable and initialize it to zero
d=0
#run a loop that checks the minimum occurrence of
#the character from the set in name1 & name2
#Minimum because for ex: a might exist thrice in name1, but only twice in name2
#we will need to take only 2 common occurrences from the name2
#thus finding the minimum occurrence of the character from both names
for x in unique:
d = d + min(name1.count(x),name2.count(x))
#multiplying by two, because if one character from name 1 matches with one,
#character from name2, then it makes two in total
difference = (len(name1) + len(name2)) - d*2
print(difference)