{"id":2958,"date":"2021-11-16T11:34:25","date_gmt":"2021-11-16T11:34:25","guid":{"rendered":"https:\/\/www.pythontutorial.net\/?page_id=2958"},"modified":"2021-11-16T11:34:27","modified_gmt":"2021-11-16T11:34:27","slug":"python-type-class","status":"publish","type":"page","link":"https:\/\/www.pythontutorial.net\/python-oop\/python-type-class\/","title":{"rendered":"Python type Class"},"content":{"rendered":"\n

Summary<\/strong>: in this tutorial, you’ll learn about the Python type class and understand how Python uses the type class to create other classes.<\/p>\n\n\n\n

Introduction to the Python type class #<\/a><\/h2>\n\n\n\n

In Python, a class<\/a> is an object of the class type<\/code>. For example, the following defines the Person<\/code> class with two methods<\/a> __init__<\/code> and greeting<\/code>:<\/p>\n\n\n

class<\/span> Person<\/span>:<\/span>\n    def<\/span> __init__<\/span>(self, name, age)<\/span>:<\/span>\n        self.name = name\n        self.age = age\n\n    def<\/span> greeting<\/span>(self)<\/span>:<\/span>\n        return<\/span> f'Hi, I am {self.name}<\/span>. I am {self.age}<\/span> year old.'<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
The Person<\/code> class is an object of the class type<\/code> as shown in the following statement:<\/p>\n\n\n
print(type(Person))<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
<class<\/span> 'type<\/span>'><\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
The Person<\/code> class is an instance of the type<\/code> class:<\/p>\n\n\n
print(isinstance(Person, type))<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Python uses the type class to create other classes. The type class itself is a callable. The following shows one of the constructors of the type class:<\/p>\n\n\n
type(name, bases, dict) -> a new type<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
The constructor has three parameters for creating a new class:<\/p>\n\n\n\n