如何参照给定Python类包示例编写加法程序包？

Based on the Mammals class example you shared, let's walk through building a fully functional addition program package step by step:

Step 1: Set Up the Package Structure #

First, mirror the package structure from the Animals example:

• Create a folder named MathOperations (this will be your main package directory)
• Inside MathOperations, create an empty file called __init__.py (this tells Python to treat the folder as a package)

Step 2: Write the Addition Module #

Create a file named adders.py inside the MathOperations folder. This will hold your addition logic, similar to mammal.py:

# MathOperations/adders.py
class Adders:
    def __init__(self):
        '''Constructor for the Adders class.'''
        self.operation_types = ["Two-number addition", "List sum"]
    
    def add_two(self, num1, num2):
        '''Return the sum of two numbers.'''
        return num1 + num2
    
    def sum_list(self, num_list):
        '''Return the sum of all elements in a list.'''
        if not isinstance(num_list, list):
            raise TypeError("Input must be a list of numbers")
        return sum(num_list)
    
    def print_operations(self):
        '''Print all available addition operations.'''
        print("Available addition operations:")
        for op in self.operation_types:
            print(f"\t- {op}")

Step 3: Write the Test Script #

Create a test_add.py file in the same directory as the MathOperations folder (not inside it), just like the example's test.py:

# test_add.py
from MathOperations.adders import Adders

# Initialize an instance of the Adders class
my_adder = Adders()

# Test the print method
my_adder.print_operations()

# Test two-number addition
two_num_result = my_adder.add_two(7, 12)
print(f"\n7 + 12 = {two_num_result}")

# Test list sum
list_sum_result = my_adder.sum_list([1, 3, 5, 7])
print(f"Sum of [1,3,5,7] = {list_sum_result}")

Step 4: Run the Program #

Open your terminal, navigate to the directory containing MathOperations and test_add.py, then run:

python test_add.py

You'll see output like this:

Available addition operations:

• Two-number addition
• List sum

7 + 12 = 19
Sum of [1,3,5,7] = 16

If you already have partial code written, just adapt this structure to match your existing class names or methods. For example, if you already have a class with different method names, update the test script to reference those instead.

内容的提问来源于stack exchange，提问作者Kaustubh