#!/usr/bin/env python3
"""
Python测试文件
这是一个示例Python脚本，用于测试语法高亮功能
"""
import os
import sys
from datetime import datetime

class ExampleClass:
    """示例类"""
    def __init__(self, name):
        self.name = name
        self.created_at = datetime.now()
    
    def say_hello(self):
        """打印问候语"""
        print(f"Hello, {self.name}! This is a Python example.")
        print(f"Created at: {self.created_at}")

def main():
    """主函数"""
    if len(sys.argv) > 1:
        name = sys.argv[1]
    else:
        name = "World"
    
    example = ExampleClass(name)
    example.say_hello()
    
    # 演示条件语句
    if os.path.exists(__file__):
        print(f"Current file: {__file__}")
    else:
        print("File not found")
    
    # 演示循环
    for i in range(5):
        print(f"Loop iteration: {i}")

if __name__ == "__main__":
    main()