Python is_leap() 函数：判断闰年

is_leap() \u662f Python \u4e2d \u7684 \u4e00 \u4e2a \u5185\u7f6e\u51fd\u6570\uff0c\u7528\u4e8e\u5224\u65ad\u7ed9\u5b9a\u7684\u5e74\u4efd\u662f\u5426\u4e3a\u987f\u5e74\u3002\u987f\u5e74\u662f\u6307\u80fd\u591f\u88ab 4 \u6574\u9664\u4f46\u4e0d\u80fd\u88ab 100 \u6574\u9664\u7684\u5e74\u4efd\uff0c\u6216\u80fd\u591f\u88ab 400 \u6574\u9664\u7684\u5e74\u4efd\u3002\n\n is_leap() \u51fd\u6570\u7684\u8fd4\u56de\u503c\u4e3a\u7c97\u522b\u503c\uff0c\u5982\u679c\u7ed9\u5b9a\u7684\u5e74\u4efd\u662f\u987f\u5e74\uff0c\u5219\u8fd4\u56de True\uff1b\u5426\u5219\u8fd4\u56de False\u3002\n\n\u4f7f\u7528 is_leap() \u51fd\u6570\u53ef\u4ee5\u65b9\u4fbf\u7684\u5224\u65ad\u4e00\u4e2a\u5e74\u4efd\u662f\u5426\u4e3a\u987f\u5e74\uff0c\u56e0\u800c\u8fdb\u884c\u76f8\u5e94\u7684\u5904\u7406\u3002\u6bd4\u5982\uff0c\u53ef\u4ee5\u6839\u636e\u7ed9\u5b9a\u7684\u5e74\u4efd\u662f\u5426\u4e3a\u987f\u5e74\u6765\u8ba1\u7b97\u8be5\u5e74\u4efd\u7684\u5929\u6570\u3001\u6708\u4efd\u7684\u5929\u6570\u7b49\u3002