函数未提供所需的结果

def calculate_average(numbers):
    total = sum(numbers)
    average = total / len(numbers)  # 逻辑错误：除以0
    return average

# 解决方法：添加边界条件检查
def calculate_average(numbers):
    if len(numbers) == 0:
        return 0
    total = sum(numbers)
    average = total / len(numbers)
    return average

def divide(a, b):
    return a / b  # 参数问题：b为0时会导致除零错误

# 解决方法：添加参数检查
def divide(a, b):
    if b == 0:
        raise ValueError("除数不能为零")
    return a / b

def find_max(numbers):
    if not numbers:  # 边界条件：空列表
        return None
    max_value = numbers[0]
    for num in numbers:
        if num > max_value:
            max_value = num
    return max_value

def add(a, b):
    return a + b  # 数据类型不匹配：a和b可能是字符串

# 解决方法：添加类型检查
def add(a, b):
    if not isinstance(a, (int, float)) or not isinstance(b, (int, float)):
        raise TypeError("参数必须是数字")
    return a + b

import requests

def fetch_data(url):
    response = requests.get(url)  # 外部依赖：网络请求失败
    return response.json()

# 解决方法：添加错误处理
def fetch_data(url):
    try:
        response = requests.get(url)
        response.raise_for_status()  # 检查HTTP响应状态码
        return response.json()
    except requests.exceptions.RequestException as e:
        print(f"请求失败: {e}")
        return None