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Python: Compute the sum of elements of a given array of integers

Python map: Exercise-11 with Solution

Write a Python program to compute the sum of elements of a given array of integers, use map() function.

Sample Solution:

Python Code :

from array import array
def array_sum(nums_arr):
    sum_n = 0
    for n in nums_arr:
        sum_n += n
    return sum_n

nums = array('i', [1, 2, 3, 4, 5, -15])
print("Original array:",nums)
nums_arr = list(map(int, nums))
result = array_sum(nums_arr)
print("Sum of all elements of the said array:")
print(result)

Sample Output:

Original array: array('i', [1, 2, 3, 4, 5, -15])
Sum of all elements of the said array:
0

Python Code Editor:

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Previous: Write a Python program to compute the square of first N Fibonacci numbers, using map function and generate a list of the numbers.
Next: Write a Python program to find the ration of positive numbers, negative numbers and zeroes in an array of integers.

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Python: Tips of the Day

Creates a dictionary with the same keys as the provided dictionary and values generated by running the provided function for each value:

Example:

def tips_map_values(obj, fn):
  ret = {}
  for key in obj.keys():
    ret[key] = fn(obj[key])
  return ret
users = {
  'Owen': { 'user': 'Owen', 'age': 29 },
  'Eddie': { 'user': 'Eddie', 'age': 15 }
}

print(tips_map_values(users, lambda u : u['age'])) # {'Owen': 29, 'Eddie': 15}

Output:

{'Owen': 29, 'Eddie': 15}