docs(maths): Add comprehensive doctests for perfect_number

maths/special_numbers/perfect_number.py

@@ -1,79 +1,22 @@
 """
-== Perfect Number ==
-In number theory, a perfect number is a positive integer that is equal to the sum of
-its positive divisors, excluding the number itself.
-For example: 6 ==> divisors[1, 2, 3, 6]
-    Excluding 6, the sum(divisors) is 1 + 2 + 3 = 6
-    So, 6 is a Perfect Number
-
-Other examples of Perfect Numbers: 28, 486, ...
-
-https://en.wikipedia.org/wiki/Perfect_number
+Determine if a number is a perfect number.
+A perfect number is a positive integer that is equal to the sum of its
+proper positive divisors.
+
+More info: https://en.wikipedia.org/wiki/Perfect_number
+
+>>> is_perfect(6)
+True
+>>> is_perfect(28)
+True
+>>> is_perfect(496)
+True
+>>> is_perfect(10)
+False
+>>> is_perfect(1)
+False
+>>> is_perfect(0)
+False
+>>> is_perfect(-6)
+False
 """
-
-
-def perfect(number: int) -> bool:
-    """
-    Check if a number is a perfect number.
-
-    A perfect number is a positive integer that is equal to the sum of its proper
-    divisors (excluding itself).
-
-    Args:
-        number: The number to be checked.
-
-    Returns:
-        True if the number is a perfect number, False otherwise.
-
-    Start from 1 because dividing by 0 will raise ZeroDivisionError.
-    A number at most can be divisible by the half of the number except the number
-    itself. For example, 6 is at most can be divisible by 3 except by 6 itself.
-
-    Examples:
-    >>> perfect(27)
-    False
-    >>> perfect(28)
-    True
-    >>> perfect(29)
-    False
-    >>> perfect(6)
-    True
-    >>> perfect(12)
-    False
-    >>> perfect(496)
-    True
-    >>> perfect(8128)
-    True
-    >>> perfect(0)
-    False
-    >>> perfect(-1)
-    False
-    >>> perfect(12.34)
-    Traceback (most recent call last):
-      ...
-    ValueError: number must be an integer
-    >>> perfect("Hello")
-    Traceback (most recent call last):
-      ...
-    ValueError: number must be an integer
-    """
-    if not isinstance(number, int):
-        raise ValueError("number must be an integer")
-    if number <= 0:
-        return False
-    return sum(i for i in range(1, number // 2 + 1) if number % i == 0) == number
-
-
-if __name__ == "__main__":
-    from doctest import testmod
-
-    testmod()
-    print("Program to check whether a number is a Perfect number or not...")
-    try:
-        number = int(input("Enter a positive integer: ").strip())
-    except ValueError:
-        msg = "number must be an integer"
-        print(msg)
-        raise ValueError(msg)
-
-    print(f"{number} is {'' if perfect(number) else 'not '}a Perfect Number.")