Python: raw_input和模板字符串语法错误

# Python 2
name = raw_input("Enter your name: ")
print("Hello, %s!" % name)

# Python 3
name = input("Enter your name: ")
print("Hello, {}!".format(name))

name = "Alice"
age = 30
print("Name: %s, Age: %d" % (name, age))

name = "Alice"
age = 30
print("Name: {}, Age: {}".format(name, age))

name = "Alice"
age = 30
print(f"Name: {name}, Age: {age}")

# 错误示例
name = "Alice"
print("Hello, {name!")  # 缺少右花括号

# 正确示例
name = "Alice"
print("Hello, {name}!")  # 添加右花括号

# 错误示例
name = "Alice"
print("Hello, {name}!")  # 未使用 f-string 或 format 方法

# 正确示例 1：使用 f-string
name = "Alice"
print(f"Hello, {name}!")

# 正确示例 2：使用 format 方法
name = "Alice"
print("Hello, {}!".format(name))

# Python 3
name = input("Enter your name: ")
age = int(input("Enter your age: "))

# 使用 f-string 进行字符串格式化
print(f"Hello, {name}! You are {age} years old.")