﻿ Python: Rearrange positive and negative numbers in a given array using Lambda - w3resource

# Python: Rearrange positive and negative numbers in a given array using Lambda

## Python Lambda: Exercise-12 with Solution

Write a Python program to rearrange positive and negative numbers in a given array using Lambda.

Sample Solution:

Python Code :

array_nums = [-1, 2, -3, 5, 7, 8, 9, -10]
print("Original arrays:")
print(array_nums)
result = sorted(array_nums, key = lambda i: 0 if i == 0 else -1 / i)
print("\nRearrange positive and negative numbers of the said array:")
print(result)

Sample Output:

Original arrays:
[-1, 2, -3, 5, 7, 8, 9, -10]

Rearrange positive and negative numbers of the said array:
[2, 5, 7, 8, 9, -10, -3, -1]

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Python Code Editor:

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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)