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 str.encode().
Python3
str = "w3wiki" # encoding the string with unicode 8 and 16 array1 = bytearray( str , 'utf-8' ) array2 = bytearray( str , 'utf-16' ) print (array1) print (array2) |
Output:
bytearray(b'w3wiki')
bytearray(b'\xff\xfeG\x00e\x00e\x00k\x00s\x00f\x00o\x00r\x00g\x00e\x00e\x00k\x00s\x00')
bytearray() Function on an Integer
In this example, an integer is passed to the bytesrray() function, which creates an array of that size and initialized with null bytes and return byte array object in Python.
Python3
# size of array size = 3 # will create an array of given size # and initialize with null bytes array1 = bytearray(size) print (array1) |
Output:
bytearray(b'\x00\x00\x00')
bytearray() Function on a byte Object
In this example, we take a byte object. The read-only buffer will be used to initialize the bytes array and return the byte array object in Python.
Python3
# Creates bytearray from byte literal arr1 = bytearray(b "abcd" ) # iterating the value for value in arr1: print (value) # Create a bytearray object arr2 = bytearray(b "aaaacccc" ) # count bytes from the buffer print ( "Count of c is:" , arr2.count(b "c" )) |
Output:
97
98
99
100
Count of c is: 4
bytearray() Function on a List of Integers
In this example, We take a Python List of integers which is passed as a parameter to the bytearray() function.
Python3
# simple list of integers list = [ 1 , 2 , 3 , 4 ] # iterable as source array = bytearray( list ) print (array) print ( "Count of bytes:" , len (array)) |
Output:
bytearray(b'\x01\x02\x03\x04')
Count of bytes: 4
bytearray() Function with no Parameters
If no source is provided to the bytearray() function, an array of size 0 is created and byte array object is returned of that empty array.
Python3
# array of size 0 will be created # iterable as source array = bytearray() print (array) |
Output:
bytearray(b'')
Python | bytearray() function
bytearray() method returns a bytearray object in Python which is an array of given bytes. It gives a mutable sequence of integers in the range 0 <= x < 256.