Python Code Refactoring for Sum Function

Language Identification

The provided code snippet is written in Python.

Code Refactoring

The following refactor aims to enhance readability, maintainability, and adherence to Python naming conventions.

Original Code

def Sum_of_two_num(n,m):
    sum=n+m
    return sum

#take user input    
a=int(input("Enter first number:"))
b=int(input("Enter second number:"))

x=Sum_of_two_num(a,b)

print("Sum of",a,"and",b,"is",x)

Refactored Code

def sum_of_two_numbers(num1, num2):
    total = num1 + num2
    return total

# Take user input    
first_number = int(input("Enter first number: "))
second_number = int(input("Enter second number: "))

result = sum_of_two_numbers(first_number, second_number)

print(f"Sum of {first_number} and {second_number} is {result}")

Annotations of Changes

1. Function Name Change:

   • Original: Sum_of_two_num
   • Refactored: sum_of_two_numbers
   • Justification: The new name follows the Python naming convention for functions (lowercase words separated by underscores) and provides clarity on the function's purpose.

2. Parameter Names Change:

   • Original: n, m
   • Refactored: num1, num2
   • Justification: The new parameter names are more descriptive, clarifying that these are numbers intended for summation.

3. Variable Name Change:

   • Original: sum
   • Refactored: total
   • Justification: The name sum shadows the built-in function sum() in Python, which could lead to bugs. Changing it to total improves clarity and avoids conflict.

4. User Input Variable Names:

   • Original: a, b
   • Refactored: first_number, second_number
   • Justification: More descriptive names enhance readability and make the code easier to understand.

5. Result Variable Name Change:

   • Original: x
   • Refactored: result
   • Justification: A more descriptive variable name indicating that it stores the result of the summation.

6. Print Statement:

   • Original: print("Sum of", a, "and", b, "is", x)
   • Refactored: print(f"Sum of {first_number} and {second_number} is {result}")
   • Justification: This uses an f-string for better readability and conciseness. It also avoids the need for multiple comma-separated parameters.

Summary

The refactored Python code improves readability and maintainability through consistent naming conventions and clearer variable/function names. The functionality of summing two numbers remains intact while enhancing the understandability of the code.