def product_of_numbers(given_numbers):
    """Return product of numbers in array"""
    product = given_numbers[0]
    for number in given_numbers[1:]:
        product *= number
    return product
 
def main():
    given_numbers = [12, 34, -86, 38, 28, 11, -16, -50]
    print(product_of_numbers(given_numbers))
 
if __name__ == '__main__':
    main()

  
import numpy
 
given_numbers = [12, 34, -86, 38, 28, 11, -16, -50]
print(numpy.prod(given_numbers))

  
>>> from math import prod
>>> prod(["x",1,2,3])
'xxxxxx'

  
>>> import functools
>>> 
>>> functools.reduce(lambda a, b: a * b, [1, 2, 3, 4, 5])
120
>>>

  
>>> import functools
>>> import operator
>>> 
>>> functools.reduce(operator.mul, [1, 2, 3, 4, 5])
120
>>>