Python isinstance

( ) 与 type( ) 有什么区别？

Python isinstance() 和 type() 在判断变量类型时有所不同。 isinstance() 函数判断一个对象是否是已知类型的实例，是则返回 True，否则返回 False。 type() 函数返回的是该变量的数据类型（比如 list、tuple、dictionary 等）。

相关问题

python isinstance

Python中的isinstance函数用于检查一个对象是否是指定类或类型的实例。它的语法是isinstance(object, classinfo)，其中object是要检查的对象，classinfo可以是一个类对象、类型对象或由它们组成的元组。如果object是classinfo的实例，则返回True，否则返回False。

Python isinstance

The Python `isinstance()` function is used to check if an object is an instance of a specified class or any of its derived classes. The function takes two parameters: the object to be checked and the class or tuple of classes to check against.

Syntax:

isinstance(object, classinfo)

Parameters:
- object: The object to be checked.
- classinfo: A class or a tuple of classes to check against.

Return Value:
- True: If the object is an instance of the specified class or any of its derived classes.
- False: If the object is not an instance of the specified class or any of its derived classes.

Example:

class Person:
    pass

class Student(Person):
    pass

s = Student()

print(isinstance(s, Student))  # Output: True
print(isinstance(s, Person))   # Output: True
print(isinstance(s, object))   # Output: True
print(isinstance(s, str))      # Output: False