﻿ Python: Compute the sum of digits of each number of a given list of positive integers - w3resource

# Python: Compute the sum of digits of each number of a given list of positive integers

## Python Itertools: Exercise-34 with Solution

Write a Python program to compute the sum of digits of each number in a given list of positive integers.

Sample Solution:

Python Code:

``````from itertools import chain
def sum_of_digits(nums):
return sum(int(y) for y in (chain(*[str(x) for x in nums])))

nums = [10,2,56]
print("Original tuple: ")
print(nums)
print("Sum of digits of each number of the said list of integers:")
print(sum_of_digits(nums))

nums = [10,20,4,5,70]
print("\nOriginal tuple: ")
print(nums)
print("Sum of digits of each number of the said list of integers:")
print(sum_of_digits(nums))
```
```

Sample Output:

```Original tuple:
[10, 2, 56]
Sum of digits of each number of the said list of integers:
14

Original tuple:
[10, 20, 4, 5, 70]
Sum of digits of each number of the said list of integers:
19
```

Python Code Editor:

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Next: Write a Python program to get all possible combinations of the elements of a given list using itertools module.

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## Python: Tips of the Day

Inverts a dictionary with non-unique hashable values:

Example:

```def tips_collect_dictionary(obj):
inv_obj = {}
for key, value in obj.items():
inv_obj.setdefault(value, list()).append(key)
return inv_obj
ages = {
"Owen": 25,
"Jhon": 25,
"Pepe": 15,
}
print(tips_collect_dictionary(ages))
```

Output:

```{25: ['Owen', 'Jhon'], 15: ['Pepe']}
```

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