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Python: bytearray() function

bytearray() function

The bytearray() function is used to get a bytearray object.

Syntax:

bytearray([source[, encoding[, errors]]])
Python: Built-in function - bytearray function()

Version:

(Python 3)

The optional source parameter can be used to initialize the array in a few different ways:

  • If it is a string, you must also give the encoding (and optionally, errors) parameters; bytearray() then converts the string to bytes using str.encode().
  • If it is an integer, the array will have that size and will be initialized with null bytes.
  • If it is an object conforming to the buffer interface, a read-only buffer of the object will be used to initialize the bytes array.
  • If it is an iterable, it must be an iterable of integers in the range 0 <= x < 256, which are used as the initial contents of the array.

Without an argument, an array of size 0 is created.

Return value

Return a new array of bytes.

Example: Array of bytes from an iterable list

num = [1, 2, 3, 4, 5]

a = bytearray(num)
print(a)

Output:

bytearray(b'\x01\x02\x03\x04\x05')

Pictorial Presentation:

Python: Built-in-function - bytearray() function

Example: Array of bytes from a string

str = "Python bytearray example."
# string with encoding 'utf-8'
a = bytearray(str, 'utf-8')
print(a)

Output:

bytearray(b'Python bytearray example.')

Pictorial Presentation:

Python: Built-in-function - bytearray() function

Example: Array of bytes of given integer size:

size = 10
a = bytearray(size)
print(a)

Output:

bytearray(b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')

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