The challenge

Find the sum of the odd numbers within an array, after cubing the initial integers. The function should return None if any of the values aren’t numbers.

Note: Booleans should not be considered as numbers.

The solution in Python code

Option 1:

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def cube_odd(arr):
    if any(type(x) is not int for x in arr):
        return None
    return sum(x ** 3 for x in arr if x % 2 != 0)

Option 2:

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def cube_odd(arr):
    if len(set(map(type,arr))) < 2:
        return sum(n**3 for n in arr if n%2)

Option 3:

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def cube_odd(arr):
    s = 0
    for n in arr:
        if type(n) != int: break
        elif n%2: s += n**3
    else:
        return s

Test cases to validate our solution

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import test
from solution import cube_odd

@test.describe("Fixed Tests")
def fixed_tests():
    @test.it('Basic Test Cases')
    def basic_test_cases():
        test.assert_equals(cube_odd([1, 2, 3, 4]), 28)
        test.assert_equals(cube_odd([-3,-2,2,3]), 0)
        test.assert_equals(cube_odd(["a",12,9,"z",42]), None)
        test.assert_equals(cube_odd([True,False,2,4,1]), None)
        
@test.describe("Random tests")
def _():
    
    from random import randint, random
    
    sol=lambda arr: None if any(type(e)!=int for e in arr) else sum(e*e*e for e in arr if e%2)
    base=["a","b","c",True,False]
    
    for _ in range(40):
        arr=[randint(-10,10) for q in range(randint(5,10))]
        arr=arr if randint(0,1) else sorted(arr+[base[randint(0,len(base)-1)] for q in range(randint(5,10))],key=lambda a: random())
        expected = sol(arr)
        @test.it(f"Testing for cube_odd({arr})")
        def _():
            test.assert_equals(cube_odd(arr[:]),expected)