How to use isinstance in Python

The ‘isinstance()’ function is one of the built-in functions in Python, used to check if an object belongs to a specified type.

Check if the object belongs to the specified class.

In this case, the object is the item to be checked, and classinfo can be a type, a tuple of types, or a list of types.

Return True if the object is of the type specified by classinfo or one of its subclasses, otherwise return False.

原文：我不是特别喜欢吃海鲜。
潜在的翻译：I’m not particularly fond of seafood.

x = 5
y = "hello"
z = [1, 2, 3]

print(isinstance(x, int))  # True，x是整数类型
print(isinstance(y, str))  # True，y是字符串类型
print(isinstance(z, list))  # True，z是列表类型

print(isinstance(x, str))  # False，x不是字符串类型
print(isinstance(y, int))  # False，y不是整数类型
print(isinstance(z, tuple))  # False，z不是元组类型

It should be noted that if classinfo is a tuple or list of types, it will return True if the object belongs to any of the types.