Bytearray functions in Python (2)

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*Memo:

• My post explains bytearray functions (1).
• My post explains string, bytes and bytearray functions.

remove() can remove the 1st byte matched to value from the bytearray, searching from the left to the right as shown below:

*Memo:

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

v = bytearray(b'ABCAB')

v.remove(ord('B'))
# v.remove(66)

print(v)
# bytearray(b'ACAB')

v.remove(ord('B'))
# v.remove(66)

print(v)
# bytearray(b'ACA')

v.remove(ord('C'))
# v.remove(67)

print(v)
# bytearray(b'AA')

v.remove(ord('a'))
# v.remove(97)
# ValueError: value not found in bytearray

pop() can remove and throw the byte from index in the bytearray in the range [The 1st index, The last index] as shown below:

*Memo:

• The 1st argument is index(Optional-Default:-1):
  • -1 means the last index.
  • Don't use index=.
• index can be signed indices(zero and positive and negative indices).
• Error occurs if index is out of range.

v = bytearray(b'ABCAB')

print(v.pop())     # 66
# print(v.pop(4))  # 66
# print(v.pop(-1)) # 66

print(v)
# bytearray(b'ABCA')

print(v.pop(1))    # 66
# print(v.pop(-3)) # 66

print(v)
# bytearray(b'ACA')

print(v.pop(1))    # 66
# print(v.pop(-2)) # 66

print(v)
# bytearray(b'AA')

print(v.pop(-3))
print(v.pop(2))
# IndexError: pop index out of range

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

*Memo:

• It has no arguments.
• del ...[:] can do clear().

v = bytearray(b'ABCDE')

v.clear()
# del v[:]

print(v)
# bytearray(b'')

reverse() can reverse the bytearray as shown below:

*Memo:

• It has no arguments.

v = bytearray(b'ABCDE')

v.reverse()

print(v)
# bytearray(b'EDCBA')