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:
…


This content originally appeared on DEV Community and was authored by Super Kai (Kazuya Ito)

Buy Me a Coffee☕

*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:

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')


This content originally appeared on DEV Community and was authored by Super Kai (Kazuya Ito)


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