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Python Exercise: Create a symmetric difference

Python sets: Exercise-9 with Solution

Write a Python program to create a symmetric difference.

From Wikipedia, in mathematics, the symmetric difference, also known as the disjunctive union, of two sets is the set of elements which are in either of the sets and not in their intersection. The symmetric difference of the sets A and B is commonly denoted by

Python Sets: Create a symmetric difference.

For example, the symmetric difference of the sets {1,2,3} and {3,4} is {1,2,4}.

Python Sets: Create a symmetric difference.

Sample Solution:-

Python Code:

setx = set(["apple", "mango"])
sety = set(["mango", "orange"])
#Symmetric difference
setc = setx ^ sety
print(setc)

Sample Output: 

{'apple', 'orange'}

Pictorial Presentation:

Python Sets: Create a symmetric difference.

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Python: Tips of the Day

Python: Cache results with decorators

There is a great way to cache functions with decorators in Python. Caching will help save time and precious resources when there is an expensive function at hand.

Implementation is easy, just import lru_cache from functools library and decorate your function using @lru_cache.

from functools import lru_cache

@lru_cache(maxsize=None)
def fibo(a):
    if a <= 1:
        return a
    else:
        return fibo(a-1) + fibo(a-2)

for i in range(20):
    print(fibo(i), end="|")

print("\n\n", fibo.cache_info())

Output:

0|1|1|2|3|5|8|13|21|34|55|89|144|233|377|610|987|1597|2584|4181|

 CacheInfo(hits=36, misses=20, maxsize=None, currsize=20)