The listing of attributes and methods of user-defined class in Python is generated by

In Python, the attributes and methods of a user-defined class can be generated or accessed using the built-in dir() function, or by using the __dict__ attribute of the class. Here's a detailed breakdown:

1. Using dir() function:

   • When you call dir(object), it returns a list of all the attributes and methods associated with the object. This includes both user-defined and built-in attributes.

2. Using __dict__:

   • Each class in Python maintains a dictionary called __dict__, which contains its attributes and methods. By accessing class_name.__dict__, you can see the attributes, methods, and their corresponding values (if applicable).

For example, if you define a class like this:

class MyClass:
    def __init__(self):
        self.attribute1 = "Value1"
    
    def method1(self):
        return "Method1 called"

You can check the attributes and methods as follows:

obj = MyClass()
print(dir(obj))       # Lists all attributes and methods
print(obj.__dict__)   # Shows attributes of the instance

This will help you understand what is defined within your user-defined class. The dir() method will return a broader list, while __dict__ focuses specifically on instance attributes.