print('"Hello"是否是tuple类的实例: ', isinstance(hello, tuple)) # str不是tuple类的子类,输出False print('str是否是tuple类的子类: ', issubclass(str, tuple)) # 定义一个列表 my_list = [2, 4] # [2, 4]是list类的实例,输出True print('[2, 4]是否是list类的实例: ', isinstance(my_li...
class Foo: a = 5 fooInstance = Foo() print(isinstance(fooInstance, Foo)) print(isinstance(fooInstance, (list, tuple))) print(isinstance(fooInstance, (list, tuple, Foo))) 输出 true flase true Python中的Isinstance:示例#2 numbers = [1, 2, 3] result = isinstance(numbers, list) print(n...
检查类型(isinstance函数的使用) isinstance()接受一个元组对象为参数 例子: In [68]: def displayNumType(num): ...: print num,'is', ...: if isinstance(num,(int,long,float,complex,bool,str,list,tuple)): ...: print 'a number of type:',type(num).__name__ ...: else: ...: print...
isinstance(object, class-or-type-or-tuple) -> bool Return whether an object is an instance of a class or of a subclass thereof. With a type as second argument, return whether that is the object's type. The form using a tuple, isinstance(x, (A, B, ...)), is a shortcut for is...
[1, 2, 3], list)}') print(f'isinstance((1, 2, 3), tuple): {isinstance((1, 2, 3), tuple)}') print(f'isinstance({test_dict}, dict): {isinstance(test_dict, dict)}') print(f'isinstance(3.14, int): {isinstance(3.14, int)}') print(f'isinstance([1, 2, 3], tuple): {...
typeA type or a class, or a tuple of types and/or classes More Examples Example Check if "Hello" is one of the types described in the type parameter: x =isinstance("Hello",(float,int,str,list,dict,tuple)) Try it Yourself » ...
新的运算符也可以用作isinstance()和issubclass()的第二个参数: 代码语言:txt AI代码解释 print(isinstance(5, int | str)) # True print(isinstance(None, int | None)) # True print(issubclass(bool, int | float)) # True print(isinstance(42, None | str)) # False ...
if isinstance(num,(int,long,float,complex)): print 'a number of type:',type(num).__name__ else: print 'not a number at all!!' displayNumType(-69) displayNumType(9999999999999999999999999999999999999L) displayNumType(98.6) displayNumType(-5.2+1.9j) ...
格式:isinstance(obj,class) 例如:print([1,2,3,],list) >>> True 返回值:bool #判断对象是否是列表类型 1. 2. 3. 4. 5. 35.issubclass() 判断是否是子类 36.iter() 迭代 格式:iter(iterable) 例如:print(iter([2,3,])) >>> <list_iterator object at 0x0000000000B23400> ...
isinstance() With Built-In Types As you know, Every value (variable) in Python has a type. In Python, we can use different built-in types such asint,float,list,tuple, strings,dictionary. Most of the time, you want to check the type of value to do some operations. In this case,isins...