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Aug 23, 2023 · In Python, the bytearray() function is a powerful tool that allows you to create a mutable sequence of bytes. This function is particularly useful when you need to manipulate binary data, work with low-level data structures, or modify existing byte sequences.
- Bytearray in A Nutshell
- What Are Bytearrays and When to Use them?
- Initializing A Bytearray Object
- Manipulating Contents of A Bytearray Object
- Looping Through A Bytearray Object
- Other Useful Bytearray Methods
ByteArray is a data structure in Python that can be used when we wish to store a collection of bytes in an ordered manner in a contiguous area of memory. ByteArray comes under binary data types. You can use the bytearray() constructor to create a ByteArray object as shown below Here the syntax we have used is Depending on the type of data we wish t...
As explained previously, ByteArray is just a data structure in Python. Each data structure is useful in solving a particular kind of problem. The ByteArray data structure is very useful when we wish to store a collection of bytes in 1. an ordered manner and 2. in a contiguous area of memory. But when will the above properties of ByteArrays come in ...
ByteArray class gives us a variety of constructors to choose from depending upon the type of data we wish to store in our ByteArray object. They are listed in the table below
Accessing items in a ByteArray object
We can access the elements of the bytearray using the index operator, i.e. the square brackets “[ ]”. The index always starts from 0 and the index of the last element is the total number of elements minus 1. Hence accessing elements of ByteArray class works the exact same way as the Lists class. Let us see a simple example Here the value at index-1 is the integer 1 and hence it is printed. We can use the same syntax to modify elements if needed As you can see, we have changed the element at i...
Adding Elements
ByteArray provides 3 methods for adding elements to an existing ByteAray object. They are 1. append() method 2. extend() method and 3. insert() method
Removing Elements
The ByteArray class gives 3 methods for removing elements from ByteArrays. They are 1. remove() method 2. pop() method and 3. clear() method
Since ByteArray is iterable, we can iterate over it using loops just like any other iterable like Lists as shown in the following example. This will give the following output Nice and simple! Methods in a class are like spells in magic, if we learn some it will definitely make our life easier. Let us go ahead and learn some methods/spells that come...
The count() method
The count() method returns the number of non-overlapping occurrences of a given subsection in ByteArray. In simpler words, we can get the number of times a sequence of bytes occurs within a given ByteArray using this method. As you can see, there are 2 ‘abc’ s in the string ‘abcd abc’ and hence we get the output as 2. Make sure that the sequence we are searching for is also in the same ByteArray or Bytes format. The syntax used with the count method is
The reverse() method
As the name suggests, the reverse() method is used to reverse the byte arrays in Python. As you can see the order of the bytes has been reversed! The syntax to use with the reverse() method is
The find() method
The find() method finds the first occurrence of the byte given to it. For example As you can see, the element “3” is at index-2, and hence find() returns 2. If the element is not present in the given ByteArray object, the find() method returns -1 as shown below There is another method named index() which works almost the same as the find() method. The only difference between find() and index is that while find() returns -1 when the item is not found, the index will throw an exception instead...
Jul 8, 2021 · Output: The string is: pythonforbeginners.com The bytearray object is: bytearray (b'pythonforbeginners.com') We can convert a list of integers to bytearray using bytearray () function in python. The bytearray () function takes the list of integers between 0 and 255 as input and returns the corresponding bytearray object as follows.
Jul 14, 2020 · Python 3's bytes and bytearray classes both hold arrays of bytes, where each byte can take on a value between 0 and 255. The primary difference is that a bytes object is immutable, meaning that once created, you cannot modify its elements. By contrast, a bytearray object allows you to modify its elements.
Nov 17, 2023 · Python bytearray() Function Examples. Let us see a few examples, for a better understanding of the bytearray() function in Python. bytearray() Function on String. In this example, we are taking a Python String and performing the bytearray() function on it. The bytearray() encodes the string and converts it to byte array object in python using ...
Oct 8, 2018 · That means, we can modify the elements in bytearray objects. Define a bytearray Object. bytearray objects are created using the bytearray class constructor. There is no relevant literal syntax to create bytearray objects. The syntax of the bytearray constructor is: Syntax: bytearray([source [, encoding [, errors] ] ])
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Parameter Description; source: Optional. A source to initialize the array.It can be an iterable, a buffer, a string, etc. encoding: Optional. If the source is a string, this parameter specifies the encoding used to convert the string to bytes.
