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Python: Extract specified size of strings from a give list of string values using lambda

Python Lambda: Exercise-31 with Solution

Write a Python program to extract specified size of strings from a give list of string values using lambda.

Sample Solution:

Python Code :

def extract_string(str_list1, l):
    result = list(filter(lambda e: len(e) == l, str_list1))
    return result

str_list1 = ['Python', 'list', 'exercises', 'practice', 'solution'] 
print("Original list:")
print(str_list1)
l = 8
print("\nlength of the string to extract:")
print(l)
print("\nAfter extracting strings of specified length from the said list:")
print(extract_string(str_list1 , l))

Sample Output:

Original list:
['Python', 'list', 'exercises', 'practice', 'solution']

length of the string to extract:
8

After extracting strings of specified length from the said list:
['practice', 'solution']

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Previous: Write a Python program to sort a given matrix in ascending order according to the sum of its rows using lambda.
Next: Write a Python program to count float number in a given mixed list using lambda.

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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)