What is the usage of bytearray in Python?

In Python, a bytearray is a type of mutable byte array that can store a byte array and allows for modification.

A bytearray object can be created in the following way:

1. arr is an empty bytearray.
2. Create a byte array containing the string “hello”.
3. Create a bytearray initialized with values 1, 2, 3, and 4.

Once a bytearray object is created, it can be modified or accessed. Here are some common methods for bytearray objects:

1. add x
2. prolong(iterable)
3. add the element x at the specified index i.
4. remove the element at index i
5. take out x
6. Return the index of the first occurrence of x in the specified slice of the list.
7. calculate the number of occurrences of x
8. invert the order
9. Sort the items in ascending order.
10. Decode the given input using a specified encoding and handle any errors that may occur.

In addition to the methods mentioned above, bytearray objects can also be indexed and sliced, as well as perform other common list operations.

It is important to note that unlike bytes objects, bytearray objects are mutable, allowing modifications in place.