Python是一种非常强大且易于学习的编程语言，适合从入门到精通的多个阶段。以下是21个有趣的Python脚本示例，涵盖了不同的主题和难度级别： 1. **Hello World**: 最简单的程序，打印“Hello, World!”。 ```python print("Hello, World!") ``` 2. **计算器**: 一个简单的命令行计算器，可以进行加、减、乘、除运算。 ```python def add(x, y): return x + y def subtract(x, y): return x - y def multiply(x, y): return x * y def divide(x, y): if y != 0: return x / y else: return "Cannot divide by zero!" print("Select operation:") print("1. Add") print("2. Subtract") print("3. Multiply") print("4. Divide") choice = input("Enter choice (1/2/3/4): ") num1 = float(input("Enter first number: ")) num2 = float(input("Enter second number: ")) if choice == '1': print(num1, "+", num2, "=", add(num1, num2)) elif choice == '2': print(num1, "-", num2, "=", subtract(num1, num2)) elif choice == '3': print(num1, "*", num2, "=", multiply(num1, num2)) elif choice == '4': print(num1, "/", num2, "=", divide(num1, num2)) else: print("Invalid input") ``` 3. **猜数字游戏**: 一个简单的猜数字游戏。 ```python import random number = random.randint(1, 100) attempts = 0 while True: guess = int(input("Guess a number between 1 and 100: ")) attempts += 1 if guess < number: print("Too low!") elif guess > number: print("Too high!") else: print(f"Congratulations! You've guessed the number in {attempts} attempts.") break ``` 4. **斐波那契数列**: 生成斐波那契数列的前N项。 ```python def fibonacci(n): fib_sequence = [0, 1] while len(fib_sequence) < n: fib_sequence.append(fib_sequence[-1] + fib_sequence[-2]) return fib_sequence[:n] n = int(input("Enter the number of terms: ")) print(fibonacci(n)) ``` 5. **字符串反转**: 反转一个字符串。 ```python def reverse_string(s): return s[::-1] string = input("Enter a string: ") print("Reversed string:", reverse_string(string)) ``` 6. **文件读写**: 读取和写入文件。 ```python with open('example.txt', 'w') as file: file.write("Hello, World!\n") file.write("This is a test file.\n") with open('example.txt', 'r') as file: content = file.read() print(content) ``` 7. **列表推导式**: 使用列表推导式生成平方数列表。 ```python numbers = [1, 2, 3, 4, 5] squares = [x**2 for x in numbers] print(squares) ``` 8. **字典操作**: 创建和操作字典。 ```python student = {"name": "John", "age": 25, "courses": ["Math", "Science"]} print(student["name"]) student["age"] = 26