Sum of Numbers Python code:

#a file containing a series of integers
#is named numbers.txt 
inputFile = "numbers.txt"
#Reads all of the numbers stored in the file 
#and calculates their total.
try:
    with open(inputFile, 'r') as file:
        numbers = file.read().split()
        total = sum(map(int, numbers))

        print(f"The total of the numbers in '{inputFile}' is: {total}")

except FileNotFoundError:
    print(f"File '{inputFile}' not found.")
except IOError:
    print(f"An error occurred while reading the file '{inputFile}'.")
except ValueError:
    print(f"The file '{inputFile}' contains non-integer values.")

Data in "numbers.txt" file:

5 
10
20
40
5
95
20
30

Executed Output:

The total of the numbers in 'numbers.txt' is: 225