*Memo for string, bytes and bytearray functions:
- My post explains replace().
- My post explains removeprefix() and removesuffix().
- My post explains endswith().
*Memo for a string, bytes and bytearray:
str.startswith() and bytes.startswith() or bytearray.startswith() can check if prefix is the prefix of the string and bytes or bytearray respectively between [start, end) as shown below:
*Memo:
- The 1st argument is
prefix(Required-Type:strandtuple(str)forstr.startswith()or Bytes-like object andtyple(Bytes-like object)forbytes.startswith()andbytearray.startswith()):- It's the prefix of zero or more characters and bytes respectively.
- If it's an empty string and bytes or bytearray respectively,
Trueis returned. - Don't use
prefix=.
- The 2nd argument is
start(Optional-Type:intor NoneType):- It's a start index(inclusive).
- If it's not set or
None,0is set to it. - Don't use
start.
- The 3rd argument is
end(Optional-Type:intor NoneType):- It's an end index(exclusive).
- If it's not set or
None, the length+ 1is set to it. - Don't use
end.
<String>:
v = 'hello world' print(v.startswith('he')) # True print(v.startswith('he', None, None)) # True print(v.startswith('HE')) # False print(v.startswith('wo')) # False print(v.startswith(('he', 'wo'))) # True print(v.startswith(('wo', 'he'))) # True print(v.startswith(('wo', 'lo'))) # False print(v.startswith('he', 0)) # True print(v.startswith('he', 1)) # False print(v.startswith('he', 0, 1)) # False print(v.startswith('he', 0, 2)) # True print(v.startswith('wo', 6, 7)) # False print(v.startswith('wo', 6, 8)) # True print(v.startswith('')) # True v = '' print(v.startswith('')) # True <Bytes & Bytearray>:
v = b'hello world' v = bytearray(b'hello world') print(v.startswith(b'he')) # True print(v.startswith(bytearray(b'he'))) # True print(v.startswith(b'he', None, None)) # True print(v.startswith(bytearray(b'he'), None, None)) # True print(v.startswith(b'HE')) # False print(v.startswith(bytearray(b'HE'))) # False print(v.startswith(b'wo')) # False print(v.startswith(bytearray(b'wo'))) # False print(v.startswith((b'he', b'wo'))) # True print(v.startswith((bytearray(b'he'), bytearray(b'wo')))) # True print(v.startswith((b'wo', b'he'))) # True print(v.startswith((bytearray(b'wo'), bytearray(b'he')))) # True print(v.startswith((b'wo', b'lo'))) # False print(v.startswith((bytearray(b'wo'), bytearray(b'lo')))) # False print(v.startswith(b'he', 0)) # True print(v.startswith(bytearray(b'he'), 0)) # True print(v.startswith(b'he', 1)) # False print(v.startswith(bytearray(b'he'), 1)) # False print(v.startswith(b'he', 0, 1)) # False print(v.startswith(bytearray(b'he'), 0, 1)) # False print(v.startswith(b'he', 0, 2)) # True print(v.startswith(bytearray(b'he'), 0, 2)) # True print(v.startswith(b'wo', 6, 7)) # False print(v.startswith(bytearray(b'wo'), 6, 7)) # False print(v.startswith(b'wo', 6, 8)) # True print(v.startswith(bytearray(b'wo'), 6, 8)) # True print(v.startswith(b'')) # True print(v.startswith(bytearray(b''))) # True v = b'' v = bytearray(b'') print(v.startswith(b'')) print(v.startswith(bytearray(b''))) # True 
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