What is the usage of help() and dir() function in Python?

In Python, the help() and dir() functions are built-in tools that allow you to get information about various objects in the language.

The help() function is used to display the documentation for a given object, such as a module, function, or class. For example, if you want to see the documentation for the math module, you can use the help() function like this:

import math

help(math)

 This will display the documentation for the math module, including a list of all the functions and variables it defines. You can also use the help() function to get help with a specific function or method within a module:

import math

help(math.sin)

This will display the documentation for the sin function, including information on its arguments and return value.

The dir() function, on the other hand, is used to display a list of the attributes and methods of a given object. For example, if you want to see a list of the attributes and methods of the math module, you can use dir() like this:

import math

dir(math)

This will display a list of all the attributes and methods defined in the math module, including functions like sin and cos, as well as variables like pi and e.

You can also use the dir() function on objects other than modules, such as functions and classes. For example:

def greet(name):

    """

    This function greets the person with the given name.

    """

    print(f"Hello, {name}!")

dir(greet)

 This will display a list of the attributes and methods of the greet function, such as __doc__ and __name__.

Overall, the help() and dir() functions are useful tools for exploring and understanding the objects in your Python code. They can help you learn about the various attributes and methods available to you, and can make it easier to use and debug your code.