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Python Exercise: Remove an item from a set if it is present in the set

Python sets: Exercise-5 with Solution

Write a Python program to remove an item from a set if it is present in the set.

Sample Solution:-

Python Code:

#Create a new set
num_set = set([0, 1, 2, 3, 4, 5])
#Discard number 4
num_set.discard(4)
print(num_set)

Sample Output:

{0, 1, 2, 3, 5}

Pictorial Presentation:

NumPy Sets: Remove an item from a set if it is present in the set.

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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)