7、'bytearray', 返回一个新字节数组。这个数组里的元素是可变的，并且每个元素的值范围: 0 <= x < 256。
class bytearray(object)
| bytearray(iterable_of_ints) -> bytearray
# 元素必须为[0 ,255] 中的整数
| bytearray(string, encoding[, errors]) -> bytearray
# 按照指定的 encoding 将字符串转换为字节序列
| bytearray(bytes_or_buffer) -> mutable copy of bytes_or_buffer
# 字节流
| bytearray(int) -> bytes array of size given by the parameter initialized with null bytes
# 返回一个长度为 source 的初始化数组
| bytearray() -> empty bytes array
# 默认就是初始化数组为0个元素
|
| Construct a mutable bytearray object from:
| - an iterable yielding integers in range(256) # bytearray([1, 2, 3])
| - a text string encoded using the specified encoding # bytearray('你妈嗨', encoding='utf-8')
| - a bytes or a buffer object # bytearray('你妈嗨'.encode('utf-8'))
| - any object implementing the buffer API. #
| - an integer # bytearray(10)
|
| Methods defined here:
|
| __add__(self, value, /)
| Return self+value.
|
| __alloc__(...)
| B.__alloc__() -> int
|
| Return the number of bytes actually allocated.
|
| __contains__(self, key, /)
| Return key in self.
|
| __delitem__(self, key, /)
| Delete self[key].
|
| __eq__(self, value, /)
| Return self==value.
|
| __ge__(self, value, /)
| Return self>=value.
|
| __getattribute__(self, name, /)
| Return getattr(self, name).
|
| __getitem__(self, key, /)
| Return self[key].
|
| __gt__(self, value, /)
| Return self>value.
|
| __iadd__(self, value, /)
| Implement self+=value.
|
| __imul__(self, value, /)
| Implement self*=value.
|
| __init__(self, /, *args, **kwargs)
| Initialize self. See help(type(self)) for accurate signature.
|
| __iter__(self, /)
| Implement iter(self).
|
| __le__(self, value, /)
| Return self<=value.
|
| __len__(self, /)
| Return len(self).
|
| __lt__(self, value, /)
| Return self<value.
|
| __mod__(self, value, /)
| Return self%value.
|
| __mul__(self, value, /)
| Return self*value.n
|
| __ne__(self, value, /)
| Return self!=value.
|
| __new__(*args, **kwargs) from builtins.type
| Create and return a new object. See help(type) for accurate signature.
|
| __reduce__(self, /)
| Return state information for pickling.
|
| __reduce_ex__(self, proto=0, /)
| Return state information for pickling.
|
| __repr__(self, /)
| Return repr(self).
|
| __rmod__(self, value, /)
| Return value%self.
|
| __rmul__(self, value, /)
| Return self*value.
|
| __setitem__(self, key, value, /)
| Set self[key] to value.
|
| __sizeof__(self, /)
| Returns the size of the bytearray object in memory, in bytes.
|
| __str__(self, /)
| Return str(self).
|
| append(self, item, /)
| Append a single item to the end of the bytearray.
|
| item
| The item to be appended.
|
| capitalize(...)
| B.capitalize() -> copy of B
|
| Return a copy of B with only its first character capitalized (ASCII)
| and the rest lower-cased.
|
| center(...)
| B.center(width[, fillchar]) -> copy of B
|
| Return B centered in a string of length width. Padding is
| done using the specified fill character (default is a space).
|
| clear(self, /)
| Remove all items from the bytearray.
|
| copy(self, /)
| Return a copy of B.
|
| count(...)
| B.count(sub[, start[, end]]) -> int
|
| Return the number of non-overlapping occurrences of subsection sub in
| bytes B[start:end]. Optional arguments start and end are interpreted
| as in slice notation.
|
| decode(self, /, encoding='utf-8', errors='strict')
| Decode the bytearray using the codec registered for encoding.
|
| encoding
| The encoding with which to decode the bytearray.
| errors
| The error handling scheme to use for the handling of decoding errors.
| The default is 'strict' meaning that decoding errors raise a
| UnicodeDecodeError. Other possible values are 'ignore' and 'replace'
| as well as any other name registered with codecs.register_error that
| can handle UnicodeDecodeErrors.
|
| endswith(...)
| B.endswith(suffix[, start[, end]]) -> bool
|
| Return True if B ends with the specified suffix, False otherwise.
| With optional start, test B beginning at that position.
| With optional end, stop comparing B at that position.
| suffix can also be a tuple of bytes to try.
|
| expandtabs(...)
| B.expandtabs(tabsize=8) -> copy of B
|
| Return a copy of B where all tab characters are expanded using spaces.
| If tabsize is not given, a tab size of 8 characters is assumed.
|
| extend(self, iterable_of_ints, /)
| Append all the items from the iterator or sequence to the end of the bytearray.
|
| iterable_of_ints
| The iterable of items to append.
|
| find(...)
| B.find(sub[, start[, end]]) -> int
|
| Return the lowest index in B where subsection sub is found,
| such that sub is contained within B[start,end]. Optional
| arguments start and end are interpreted as in slice notation.
|
| Return -1 on failure.
|
| fromhex(string, /) from builtins.type
| Create a bytearray object from a string of hexadecimal numbers.
|
| Spaces between two numbers are accepted.
| Example: bytearray.fromhex('B9 01EF') -> bytearray(b'\\xb9\\x01\\xef')
|
| hex(...)
| B.hex() -> string
|
| Create a string of hexadecimal numbers from a bytearray object.
| Example: bytearray([0xb9, 0x01, 0xef]).hex() -> 'b901ef'.
|
| index(...)
| B.index(sub[, start[, end]]) -> int
|
| Return the lowest index in B where subsection sub is found,
| such that sub is contained within B[start,end]. Optional
| arguments start and end are interpreted as in slice notation.
|
| Raises ValueError when the subsection is not found.
|
| insert(self, index, item, /)
| Insert a single item into the bytearray before the given index.
|
| index
| The index where the value is to be inserted.
| item
| The item to be inserted.
|
| isalnum(...)
| B.isalnum() -> bool
|
| Return True if all characters in B are alphanumeric
| and there is at least one character in B, False otherwise.
|
| isalpha(...)
| B.isalpha() -> bool
|
| Return True if all characters in B are alphabetic
| and there is at least one character in B, False otherwise.
|
| isdigit(...)
| B.isdigit() -> bool
|
| Return True if all characters in B are digits
| and there is at least one character in B, False otherwise.
|
| islower(...)
| B.islower() -> bool
|
| Return True if all cased characters in B are lowercase and there is
| at least one cased character in B, False otherwise.
|
| isspace(...)
| B.isspace() -> bool
|
| Return True if all characters in B are whitespace
| and there is at least one character in B, False otherwise.
|
| istitle(...)
| B.istitle() -> bool
|
| Return True if B is a titlecased string and there is at least one
| character in B, i.e. uppercase characters may only follow uncased
| characters and lowercase characters only cased ones. Return False
| otherwise.
|
| isupper(...)
| B.isupper() -> bool
|
| Return True if all cased characters in B are uppercase and there is
| at least one cased character in B, False otherwise.
|
| join(self, iterable_of_bytes, /)
| Concatenate any number of bytes/bytearray objects.
|
| The bytearray whose method is called is inserted in between each pair.
|
| The result is returned as a new bytearray object.
|
| ljust(...)
| B.ljust(width[, fillchar]) -> copy of B
|
| Return B left justified in a string of length width. Padding is
| done using the specified fill character (default is a space).
|
| lower(...)
| B.lower() -> copy of B
|
| Return a copy of B with all ASCII characters converted to lowercase.
|
| lstrip(self, bytes=None, /)
| Strip leading bytes contained in the argument.
|
| If the argument is omitted or None, strip leading ASCII whitespace.
|
| partition(self, sep, /)
| Partition the bytearray into three parts using the given separator.
|
| This will search for the separator sep in the bytearray. If the separator is
| found, returns a 3-tuple containing the part before the separator, the
| separator itself, and the part after it.
|
| If the separator is not found, returns a 3-tuple containing the original
| bytearray object and two empty bytearray objects.
|
| pop(self, index=-1, /)
| Remove and return a single item from B.
|
| index
| The index from where to remove the item.
| -1 (the default value) means remove the last item.
|
| If no index argument is given, will pop the last item.
|
| remove(self, value, /)
| Remove the first occurrence of a value in the bytearray.
|
| value
| The value to remove.
|
| replace(self, old, new, count=-1, /)
| Return a copy with all occurrences of substring old replaced by new.
|
| count
| Maximum number of occurrences to replace.
| -1 (the default value) means replace all occurrences.
|
| If the optional argument count is given, only the first count occurrences are
| replaced.
|
| reverse(self, /)
| Reverse the order of the values in B in place.
|
| rfind(...)
| B.rfind(sub[, start[, end]]) -> int
|
| Return the highest index in B where subsection sub is found,
| such that sub is contained within B[start,end]. Optional
| arguments start and end are interpreted as in slice notation.
|
| Return -1 on failure.
|
| rindex(...)
| B.rindex(sub[, start[, end]]) -> int
|
| Return the highest index in B where subsection sub is found,
| such that sub is contained within B[start,end]. Optional
| arguments start and end are interpreted as in slice notation.
|
| Raise ValueError when the subsection is not found.
|
| rjust(...)
| B.rjust(width[, fillchar]) -> copy of B
|
| Return B right justified in a string of length width. Padding is
| done using the specified fill character (default is a space)
|
| rpartition(self, sep, /)
| Partition the bytes into three parts using the given separator.
|
| This will search for the separator sep in the bytearray, starting and the end.
| If the separator is found, returns a 3-tuple containing the part before the
| separator, the separator itself, and the part after it.
|
| If the separator is not found, returns a 3-tuple containing two empty bytearray
| objects and the original bytearray object.
|
| rsplit(self, /, sep=None, maxsplit=-1)
| Return a list of the sections in the bytearray, using sep as the delimiter.
|
| sep
| The delimiter according which to split the bytearray.
| None (the default value) means split on ASCII whitespace characters
| (space, tab, return, newline, formfeed, vertical tab).
| maxsplit
| Maximum number of splits to do.
| -1 (the default value) means no limit.
|
| Splitting is done starting at the end of the bytearray and working to the front.
|
| rstrip(self, bytes=None, /)
| Strip trailing bytes contained in the argument.
|
| If the argument is omitted or None, strip trailing ASCII whitespace.
|
| split(self, /, sep=None, maxsplit=-1)
| Return a list of the sections in the bytearray, using sep as the delimiter.
|
| sep
| The delimiter according which to split the bytearray.
| None (the default value) means split on ASCII whitespace characters
| (space, tab, return, newline, formfeed, vertical tab).
| maxsplit
| Maximum number of splits to do.
| -1 (the default value) means no limit.
|
| splitlines(self, /, keepends=False)
| Return a list of the lines in the bytearray, breaking at line boundaries.
|
| Line breaks are not included in the resulting list unless keepends is given and
| true.
|
| startswith(...)
| B.startswith(prefix[, start[, end]]) -> bool
|
| Return True if B starts with the specified prefix, False otherwise.
| With optional start, test B beginning at that position.
| With optional end, stop comparing B at that position.
| prefix can also be a tuple of bytes to try.
|
| strip(self, bytes=None, /)
| Strip leading and trailing bytes contained in the argument.
|
| If the argument is omitted or None, strip leading and trailing ASCII whitespace.
|
| swapcase(...)
| B.swapcase() -> copy of B
|
| Return a copy of B with uppercase ASCII characters converted
| to lowercase ASCII and vice versa.
|
| title(...)
| B.title() -> copy of B
|
| Return a titlecased version of B, i.e. ASCII words start with uppercase
| characters, all remaining cased characters have lowercase.
|
| translate(self, table, /, delete=b'')
| Return a copy with each character mapped by the given translation table.
|
| table
| Translation table, which must be a bytes object of length 256.
|
| All characters occurring in the optional argument delete are removed.
| The remaining characters are mapped through the given translation table.
|
| upper(...)
| B.upper() -> copy of B
|
| Return a copy of B with all ASCII characters converted to uppercase.
|
| zfill(...)
| B.zfill(width) -> copy of B
|
| Pad a numeric string B with zeros on the left, to fill a field
| of the specified width. B is never truncated.
|
| ----------------------------------------------------------------------
| Static methods defined here:
|
| maketrans(frm, to, /)
| Return a translation table useable for the bytes or bytearray translate method.
|
| The returned table will be one where each byte in frm is mapped to the byte at
| the same position in to.
|
| The bytes objects frm and to must be of the same length.
|
| ----------------------------------------------------------------------
| Data and other attributes defined here:
|
| __hash__ = None