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Python Exercise: Union of sets

Python sets: Exercise-7 with Solution

Write a Python program to create a union of sets.

Sample Solution:-

Python Code:

#Union
setx = set(["green", "blue"])
sety = set(["blue", "yellow"])
seta = setx | sety
print(seta)

Sample Output:

{'yellow', 'green', 'blue'} 

Pictorial Presentation:

NumPy Sets: Union of sets.

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Previous: Write a Python program to create an intersection of sets.
Next: Write a Python program to create set 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)