The resize() method of bytearray class in Python

Method Signature:

resize(numBytes)

Parameters:

numBytes - The number of bytes to be increased or decreased on the bytearray.

Return value:

None. The size is modified on buffer itself. No copy of the bytearray is returned.

Overview:

The method resize() of the bytearray class increases or decreases the size of the bytearray by a given number of bytes. Increasing the size of the bytearray also zero initializes the newly acquired space of the bytearray. The method resize() does not return a new buffer. Instead, it just resizes the existing buffer.

Resizing a bytearray in Python

Example:

# Example Python program that resizes a
# bytearray using the method resize()

# Create a bytearray
buffer = bytearray(b"Hello World!")
print("Initial bytearray:")
print(buffer)

# Increase the size of the bytearray twofold
x=buffer.resize(len(buffer)*2)
print("Bytearray after increasing its size:")
print(buffer)

# Decrease the size of the bytearray
buffer.resize(int(len(buffer)/4))
print("Bytearray after reducing its size:")
print(buffer)

Output:

Initial bytearray:
bytearray(b'Hello World!')
Bytearray after increasing its size:
bytearray(b'Hello World!\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
Bytearray after reducing its size:
bytearray(b'Hello ')