>>>isinstance (a,int) True>>>isinstance (a,str) False>>> isinstance (a,(str,int,list))#是元组中的一个返回 TrueTrue
result =isinstance(number,int)print(number,'instance of int?', result) When you run the program, the output will be: [1, 2, 3] instance of list? True [1, 2, 3] instance of dict? False [1, 2, 3] instance of dict or list? True 5 instance of list? False 5 instance of int?
list02=[1,2,3]it=iter(list02)whileTrue:print(next(it))#输出结果123Traceback(most recent call last):File"func_1.py",line55,in<module>print(next(it))StopIteration 可以使用isinstance()判断一个对象是否可迭代: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 from collections.abcimportIterable...
Python中的Isinstance:示例#2 numbers = [1, 2, 3] result = isinstance(numbers, list) print(numbers,'instance of list?', result) result = isinstance(numbers, dict) print(numbers,'instance of dict?', result) result = isinstance(numbers, (dict, list)) print(numbers,'instance of dict or li...
example_dict['apple'] = 'red fruit' •查询键值:通过键名访问对应的值。 type_of_banana = example_dict['banana'] •检查键是否存在:使用关键字in判断键是否存在于字典中。 if 'orange' in example_dict: print("Orange is in the dictionary!") ...
Python|装饰器|执行时间|递归|类和对象|动态属性|静态方法和类|继承和多态|isinstance|溢出|"魔法”方法|语言基础50课:学习记录(6)-函数的高级应用、面向对象编程、进阶及应用 打酱油的工程师 学习?!生活-MCU单片机爱好者 来自专栏 · python50课学习
)ifnotisinstance(value,self.type_):raiseTypeError(f'must be{self.type_}')instance.__dict__[...
函数isinstance()可以判断一个变量的类型,既可以用在Python内置的数据类型如str、list、dict,也可以用在我们自定义的类,它们本质上都是数据类型。 假设有如下的Person、Student和Teacher的定义及继承关系如下: class Person(object): def __init__(self, name, gender): ...
isinstance(object,classinfo) 1. 其中,object表示要判断的变量,classinfo表示指定的类型。如果object是classinfo的实例,isinstance()函数会返回True,否则返回False。 对于字典类型,我们可以将classinfo设置为dict。以下是一个示例代码: my_dict={"name":"Alice","age":25}ifisinstance(my_dict,dict):print("my_di...
You can also pass multiple classes/types in a tuple format. For example, you can passint,str,list,dict, or any user-created class. Execute your operation, If result is True Theisinstance()returnsTrueif an object or variable is of a specified type otherwiseFalse. ...