bytearray functions in Python

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*Memo for string, bytes and bytearray functions:

• My post explains ord(), sorted() and reversed().

*Memo for a string, bytes and bytearray:

• My post explains a string.
• My post explains a bytes.
• My post explains a bytearray.

bytearray.append() can add a byte to the end of the bytearray as shown below:

*Memo:

• The 1st argument is item(Required-Type:int):
  • Don't use item=.

v = bytearray(b'ABC') v.append(ord('D')) # v.append(68)  print(v) # bytearray(b'ABCD')  v.append(ord('E')) # v.append(69)  print(v) # bytearray(b'abcde') 

bytearray.extend() can add a bytes or bytearray to the end of the bytearray as shown below:

*Memo:

• The 1st argument is iterable(Required-Type:Bytes-like-object or int):
  • Don't use iterable=.

v = bytearray(b'ABC') v.extend(b'D') # v.extend(bytearray(b'D'))  print(v) # bytearray(b'ABCD')  v.extend(b'EF') # v.extend(bytearray(b'EF'))  print(v) # bytearray(b'ABCDEF')  v.extend(b'') # v.extend(bytearray(b''))  print(v) # bytearray(b'ABCDEF') 

bytearray.insert() can add a byte to the selected index in the bytearray as shown below:

*Memo:

• The 1st argument is index(Required-Type:int):
  • Don't use index=.
• The 2nd argument is item(Required-Type:int):
  • Don't use item=.

v = bytearray(b'abcd') v.insert(2, ord('X')) # v.insert(2, 88)  print(v) # bytearray(b'abXcd')  v.insert(0, ord('Y')) # v.insert(0, 89)  print(v) # bytearray(b'YabXcd')  v.insert(6, ord('Z')) # v.insert(6, 90)  print(v) # bytearray(b'YabXcdZ') 

bytearray.remove() can remove a byte from the bytearray as shown below:

*Memos:

• The 1st argument is value(Required-Type:int):
  • Error occurs if value doesn't exist.
  • Don't use value=.

v = bytearray(b'abcd') v.remove(ord('b')) # v.remove(98)  print(v) # bytearray(b'acd')  v.remove(ord('c')) # v.remove(99)  print(v) # bytearray(b'ad')  v.remove(ord('e')) # v.remove(101) # ValueError: value not found in bytearray 

bytearray.clear() can remove all bytes from the bytearray as shown below:

*Memo:

• It has no arguments.

v = bytearray(b'abcde') v.clear() # del v[:]  print(v) # bytearray(b'') 

bytearray.pop() can remove and throw a byte from the bytearray as shown below:

*Memo:

• The 1st argument is index(Optional-Default:-1):
  • -1 means the last byte.
  • Don't use index=.

v = bytearray(b'abcde') print(v.pop()) # print(v.pop(4)) # 101  print(v) # bytearray(b'abcd')  print(v.pop(2)) # 99  print(v) # bytearray(b'abd') 

bytearray.reverse() can reverse the bytearray as shown below:

*Memo:

• It has no arguments.

v = bytearray(b'abcde') v.reverse() print(v) # bytearray(b'edcba')