当然可以！以下是一些**经典的 Python 小案例**，适合初学者和进阶者练习，帮助你更好地理解 Python 的语法、结构和常用模块。 --- ## 🧩 经典 Python 小案例（附代码） ### 1. 🧮 计算器（控制台版） ```python def calculator(): num1 = float(input("请输入第一个数字: ")) op = input("请输入运算符 (+, -, *, /): ") num2 = float(input("请输入第二个数字: ")) if op == '+': result = num1 + num2 elif op == '-': result = num1 - num2 elif op == '*': result = num1 * num2 elif op == '/': result = num1 / num2 if num2 != 0 else "不能除以零" else: result = "无效的运算符" print("结果是：", result) calculator() ``` --- ### 2. 📄 文件内容统计（统计行数、单词数、字符数） ```python def file_stats(filename): with open(filename, 'r', encoding='utf-8') as f: content = f.read() lines = content.splitlines() words = content.split() chars = len(content) print(f"行数: {len(lines)}") print(f"单词数: {len(words)}") print(f"字符数: {chars}") file_stats("example.txt") ``` --- ### 3. 🎲 猜数字游戏（随机数版） ```python import random def guess_number(): number = random.randint(1, 100) while True: guess = int(input("猜一个 1 到 100 之间的数字: ")) if guess == number: print("恭喜你猜对了！") break elif guess < number: print("太小了！") else: print("太大了！") guess_number() ``` --- ### 4. 🧾 简易待办事项列表（命令行版） ```python todo_list = [] def add_item(item): todo_list.append(item) print("已添加:", item) def show_list(): print("\n待办事项:") for i, item in enumerate(todo_list, 1): print(f"{i}. {item}") def remove_item(index): try: removed = todo_list.pop(index - 1) print("已移除:", removed) except IndexError: print("无效的序号") while True: cmd = input("\n输入命令 (add/show/remove/exit): ").strip().lower() if cmd == 'add': item = input("请输入要添加的内容: ") add_item(item) elif cmd == 'show': show_list() elif cmd == 'remove': index = int(input("请输入要删除的序号: ")) remove_item(index) elif cmd == 'exit': break else: print("未知命令") ``` --- ### 5. 🕒 时间戳转换器（秒转时分秒） ```python def seconds_to_time(seconds): hours = seconds // 3600 minutes = (seconds % 3600) // 60 secs = seconds % 60 return f"{hours}小时 {minutes}分钟 {secs}秒" total_seconds = int(input("请输入秒数: ")) print(seconds_to_time(total_seconds)) ``` --- ### 6. 📊 计算斐波那契数列前 N 项 ```python def fibonacci(n): sequence = [0, 1] for i in range(2, n): sequence.append(sequence[-1] + sequence[-2]) return sequence[:n] n = int(input("请输入要计算的斐波那契数列项数: ")) print(f"前 {n} 项为：", fibonacci(n)) ``` --- ### 7. 🔐 简单密码强度检测器 ```python def check_password_strength(password): strength = 0 if len(password) >= 8: strength += 1 if any(c.islower() for c in password): strength += 1 if any(c.isupper() for c in password): strength += 1 if any(c.isdigit() for c in password): strength += 1 if any(not c.isalnum() for c in password): strength += 1 if strength >= 4: return "强密码" elif strength >= 2: return "中等密码" else: return "弱密码" pwd = input("请输入密码: ") print("密码强度：", check_password_strength(pwd)) ``` --- ## ✅ 总结 这些案例涵盖了： - 基础语法（条件、循环、函数） - 输入输出（用户输入、文件操作） - 数据结构（列表、字符串处理） - 模块使用（如 `random`） - 实用小工具（计算器、密码检测、待办事项） --- ###