類名str
基本操作
- 切片 [開始位置：結束位置(：步長)]
s = "hello，world！"
取前兩個字符 s = [0:2] 0可以省略，切片取頭不取尾
反轉字符串 s = [-1 : : -1]
取整個字符串 s = [ : ] 後面什麼都不寫默認取完
- 索引 [索引值] 注：不支持索引修改字符串值，會報錯
索引值的範圍是0-字符串長度減一，超過這個範圍會報錯(IndexError: string index out of range)
- 各種方法函數：
def capitalize(self): # real signature unknown; restored from __doc__ #將字符串首字母大寫，其餘小寫 """ S.capitalize() -> str Return a capitalized version of S, i.e. make the first character have upper case and the rest lower case. """ return "" def casefold(self): # real signature unknown; restored from __doc__ #將不分語種的字符串全部小寫 """ S.casefold() -> str Return a version of S suitable for caseless comparisons. """ return "" def center(self, width, fillchar=None): # real signature unknown; restored from __doc__ 將字符串填入width長的字符中間，並將其餘字符用fillchar填充 """ S.center(width[, fillchar]) -> str Return S centered in a string of length width. Padding is done using the specified fill character (default is a space) """ return "" def count(self, sub, start=None, end=None): # real signature unknown; restored from __doc__ 返回sub子序列在字符串指定位置中出現次數，start開始位置，end結束位置 """ S.count(sub[, start[, end]]) -> int Return the number of non-overlapping occurrences of substring sub in string S[start:end]. Optional arguments start and end are interpreted as in slice notation. """ return 0 def encode(self, encoding='utf-8', errors='strict'): # real signature unknown; restored from __doc__ 改變編碼格式 默認utf-8 """ S.encode(encoding='utf-8', errors='strict') -> bytes Encode S using the codec registered for encoding. Default encoding is 'utf-8'. errors may be given to set a different error handling scheme. Default is 'strict' meaning that encoding errors raise a UnicodeEncodeError. Other possible values are 'ignore', 'replace' and 'xmlcharrefreplace' as well as any other name registered with codecs.register_error that can handle UnicodeEncodeErrors. """ return b"" def endswith(self, suffix, start=None, end=None): # real signature unknown; restored from __doc__ 判斷字符串是否以suffix子序列結尾，strat開始，end結束 """ S.endswith(suffix[, start[, end]]) -> bool Return True if S ends with the specified suffix, False otherwise. With optional start, test S beginning at that position. With optional end, stop comparing S at that position. suffix can also be a tuple of strings to try. """ return False def expandtabs(self, tabsize=8): # real signature unknown; restored from __doc__ 指定製表符/t佔有位數，tabsize指定佔有位數 """ S.expandtabs(tabsize=8) -> str Return a copy of S where all tab characters are expanded using spaces. If tabsize is not given, a tab size of 8 characters is assumed. """ return "" def find(self, sub, start=None, end=None): # real signature unknown; restored from __doc__ 返回在字符串中最先出現的子序列的索引號，如果不存在返回-1 """ S.find(sub[, start[, end]]) -> int Return the lowest index in S where substring sub is found, such that sub is contained within S[start:end]. Optional arguments start and end are interpreted as in slice notation. Return -1 on failure. """ return 0 def format(self, *args, **kwargs): # known special case of str.format 字符串格式化 """ S.format(*args, **kwargs) -> str Return a formatted version of S, using substitutions from args and kwargs. The substitutions are identified by braces ('{' and '}'). """ pass def format_map(self, mapping): # real signature unknown; restored from __doc__ 字符串格式化，指定mapping格式 """ S.format_map(mapping) -> str Return a formatted version of S, using substitutions from mapping. The substitutions are identified by braces ('{' and '}'). """ return "" def index(self, sub, start=None, end=None): # real signature unknown; restored from __doc__ 返回子序列的索引，無則報錯 """ S.index(sub[, start[, end]]) -> int Return the lowest index in S where substring sub is found, such that sub is contained within S[start:end]. Optional arguments start and end are interpreted as in slice notation. Raises ValueError when the substring is not found. """ return 0 def isalnum(self): # real signature unknown; restored from __doc__ 判斷是否全是數字、字母 """ S.isalnum() -> bool Return True if all characters in S are alphanumeric and there is at least one character in S, False otherwise. """ return False def isalpha(self): # real signature unknown; restored from __doc__ 判斷是否全是字母 """ S.isalpha() -> bool Return True if all characters in S are alphabetic and there is at least one character in S, False otherwise. """ return False def isdecimal(self): # real signature unknown; restored from __doc__ 判斷是否全是十進制數字 """ S.isdecimal() -> bool Return True if there are only decimal characters in S, False otherwise. """ return False def isdigit(self): # real signature unknown; restored from __doc__ 判斷是否全是數字 """ S.isdigit() -> bool Return True if all characters in S are digits and there is at least one character in S, False otherwise. """ return False def isidentifier(self): # real signature unknown; restored from __doc__ 判斷是否是有效標識符，用來判斷變量命名是否合法 """ S.isidentifier() -> bool Return True if S is a valid identifier according to the language definition. Use keyword.iskeyword() to test for reserved identifiers such as "def" and "class". """ return False def islower(self): # real signature unknown; restored from __doc__ 判斷是否全是小寫 """ S.islower() -> bool Return True if all cased characters in S are lowercase and there is at least one cased character in S, False otherwise. """ return False def isnumeric(self): # real signature unknown; restored from __doc__ 判斷是否全是數字 """ S.isnumeric() -> bool Return True if there are only numeric characters in S, False otherwise. """ return False def isprintable(self): # real signature unknown; restored from __doc__ 判斷是否全可以打印 """ S.isprintable() -> bool Return True if all characters in S are considered printable in repr() or S is empty, False otherwise. """ return False def isspace(self): # real signature unknown; restored from __doc__ 判斷是否全是空格、換行符、製表符 """ S.isspace() -> bool Return True if all characters in S are whitespace and there is at least one character in S, False otherwise. """ return False def istitle(self): # real signature unknown; restored from __doc__ 判斷是否是標題字符 """ S.istitle() -> bool Return True if S is a titlecased string and there is at least one character in S, i.e. upper- and titlecase characters may only follow uncased characters and lowercase characters only cased ones. Return False otherwise. """ return False def isupper(self): # real signature unknown; restored from __doc__ 判斷是否全是大寫 """ S.isupper() -> bool Return True if all cased characters in S are uppercase and there is at least one cased character in S, False otherwise. """ return False def join(self, iterable): # real signature unknown; restored from __doc__ 生成一個由指定字符串填充連接可迭代字符的字符串 """ S.join(iterable) -> str Return a string which is the concatenation of the strings in the iterable. The separator between elements is S. """ return "" def ljust(self, width, fillchar=None): # real signature unknown; restored from __doc__ 內容左對齊，右側填充，默認空格，可選fillchar """ S.ljust(width[, fillchar]) -> str Return S left-justified in a Unicode string of length width. Padding is done using the specified fill character (default is a space). """ return "" def lower(self): # real signature unknown; restored from __doc__ 將字符串中的所有英文字母小寫 """ S.lower() -> str Return a copy of the string S converted to lowercase. """ return "" def lstrip(self, chars=None): # real signature unknown; restored from __doc__ 移除左側空格 """ S.lstrip([chars]) -> str Return a copy of the string S with leading whitespace removed. If chars is given and not None, remove characters in chars instead. """ return "" def maketrans(self, *args, **kwargs): # real signature unknown 創建字符映射的轉換表 """ Return a translation table usable for str.translate(). If there is only one argument, it must be a dictionary mapping Unicode ordinals (integers) or characters to Unicode ordinals, strings or None. Character keys will be then converted to ordinals. If there are two arguments, they must be strings of equal length, and in the resulting dictionary, each character in x will be mapped to the character at the same position in y. If there is a third argument, it must be a string, whose characters will be mapped to None in the result. """ pass def partition(self, sep): # real signature unknown; restored from __doc__ 將字符串分成三部分：sep序列、sep前序列、sep後序列 """ S.partition(sep) -> (head, sep, tail) Search for the separator sep in S, and return the part before it, the separator itself, and the part after it. If the separator is not found, return S and two empty strings. """ pass def replace(self, old, new, count=None): # real signature unknown; restored from __doc__ 替換字符，count指定替換次數 """ S.replace(old, new[, count]) -> str Return a copy of S with all occurrences of substring old replaced by new. If the optional argument count is given, only the first count occurrences are replaced. """ return "" def rfind(self, sub, start=None, end=None): # real signature unknown; restored from __doc__ 返回從右往左查找子序列的索引，沒找到返回-1 """ S.rfind(sub[, start[, end]]) -> int Return the highest index in S where substring sub is found, such that sub is contained within S[start:end]. Optional arguments start and end are interpreted as in slice notation. Return -1 on failure. """ return 0 def rindex(self, sub, start=None, end=None): # real signature unknown; restored from __doc__ 從右邊開始查找子序列，沒找到報錯 """ S.rindex(sub[, start[, end]]) -> int Return the highest index in S where substring sub is found, such that sub is contained within S[start:end]. Optional arguments start and end are interpreted as in slice notation. Raises ValueError when the substring is not found. """ return 0 def rjust(self, width, fillchar=None): # real signature unknown; restored from __doc__ 內容右對齊，左側填充 """ S.rjust(width[, fillchar]) -> str Return S right-justified in a string of length width. Padding is done using the specified fill character (default is a space). """ return "" def rpartition(self, sep): # real signature unknown; restored from __doc__ 從右邊開始，將字符串分成三部分，sep、sep後】sep前 """ S.rpartition(sep) -> (head, sep, tail) Search for the separator sep in S, starting at the end of S, and return the part before it, the separator itself, and the part after it. If the separator is not found, return two empty strings and S. """ pass def rsplit(self, sep=None, maxsplit=-1): # real signature unknown; restored from __doc__ 從右邊開始返回按指定分隔符切割指定次數字符串的list """ S.rsplit(sep=None, maxsplit=-1) -> list of strings Return a list of the words in S, using sep as the delimiter string, starting at the end of the string and working to the front. If maxsplit is given, at most maxsplit splits are done. If sep is not specified, any whitespace string is a separator. """ return [] def rstrip(self, chars=None): # real signature unknown; restored from __doc__ 移除右側空白 """ S.rstrip([chars]) -> str Return a copy of the string S with trailing whitespace removed. If chars is given and not None, remove characters in chars instead. """ return "" def split(self, sep=None, maxsplit=-1): # real signature unknown; restored from __doc__ 按指定分隔符切割字符串，maxsplit指定切割次數，從左往右 """ S.split(sep=None, maxsplit=-1) -> list of strings Return a list of the words in S, using sep as the delimiter string. If maxsplit is given, at most maxsplit splits are done. If sep is not specified or is None, any whitespace string is a separator and empty strings are removed from the result. """ return [] def splitlines(self, keepends=None): # real signature unknown; restored from __doc__ 根據換行符分割字符串 """ S.splitlines([keepends]) -> list of strings Return a list of the lines in S, breaking at line boundaries. Line breaks are not included in the resulting list unless keepends is given and true. """ return [] def startswith(self, prefix, start=None, end=None): # real signature unknown; restored from __doc__ 判斷是否以子序列開頭 """ S.startswith(prefix[, start[, end]]) -> bool Return True if S starts with the specified prefix, False otherwise. With optional start, test S beginning at that position. With optional end, stop comparing S at that position. prefix can also be a tuple of strings to try. """ return False def strip(self, chars=None): # real signature unknown; restored from __doc__ 去除首尾空格 """ S.strip([chars]) -> str Return a copy of the string S with leading and trailing whitespace removed. If chars is given and not None, remove characters in chars instead. """ return "" def swapcase(self): # real signature unknown; restored from __doc__ 大寫變小寫，小寫變大寫 """ S.swapcase() -> str Return a copy of S with uppercase characters converted to lowercase and vice versa. """ return "" def title(self): # real signature unknown; restored from __doc__ 將字符串變爲title字符 """ S.title() -> str Return a titlecased version of S, i.e. words start with title case characters, all remaining cased characters have lower case. """ return "" def translate(self, table): # real signature unknown; restored from __doc__ 轉換字符，按照table規則 #intab = "aeiou" #outtab = "12345" #trantab = str.maketrans(intab, outtab) #s = "this is string example....wow!!!" #print(s.translate(trantab) """ S.translate(table) -> str Return a copy of the string S in which each character has been mapped through the given translation table. The table must implement lookup/indexing via __getitem__, for instance a dictionary or list, mapping Unicode ordinals to Unicode ordinals, strings, or None. If this operation raises LookupError, the character is left untouched. Characters mapped to None are deleted. """ return "" def upper(self): # real signature unknown; restored from __doc__ 大寫 """ S.upper() -> str Return a copy of S converted to uppercase. """ return "" def zfill(self, width): # real signature unknown; restored from __doc__ 返回指定長度字符串，原字符串右對齊，左側填0 """ S.zfill(width) -> str Pad a numeric string S with zeros on the left, to fill a field of the specified width. The string S is never truncated. """ return ""def __add__(self, *args, **kwargs): # real signature unknown """ 字符串的加法運算 """ """ Return self+value. """ pass def __contains__(self, *args, **kwargs): # real signature unknown """ 是否包含 """ """ Return key in self. """ pass def __eq__(self, *args, **kwargs): # real signature unknown """ 比較前後兩個字符串是否相等 """ """ Return self==value. """ pass def __format__(self, format_spec): # real signature unknown; restored from __doc__ """ 字符串格式化 """ """ S.__format__(format_spec) -> str Return a formatted version of S as described by format_spec. """ return "" def __getattribute__(self, *args, **kwargs): # real signature unknown """ x.__getattribute__('name') <==> x.name """ """ Return getattr(self, name). """ pass def __getitem__(self, *args, **kwargs): # real signature unknown """ 根據索引取值 x.____getitem__(y) <==> x[y] """ """ Return self[key]. """ pass def __getnewargs__(self, *args, **kwargs): # real signature unknown """ 內部調用__new__或創建對象時傳入參數使用 """ pass def __ge__(self, *args, **kwargs): # real signature unknown """ 比較左邊的字符串的ascii碼值是否大於等於右邊的ascii碼值 """ """ Return self>=value. """ pass def __gt__(self, *args, **kwargs): # real signature unknown """ 比較左邊的字符串的ascii碼值是否大於右邊的ascii碼值 """ """ Return self>value. """ pass def __hash__(self, *args, **kwargs): # real signature unknown """ 返回字符串的哈希值 """ """ Return hash(self). """ pass def __init__(self, value='', encoding=None, errors='strict'): # known special case of str.__init__ """ 構造方法，創建string對象時調用 """ """ str(object='') -> str str(bytes_or_buffer[, encoding[, errors]]) -> str Create a new string object from the given object. If encoding or errors is specified, then the object must expose a data buffer that will be decoded using the given encoding and error handler. Otherwise, returns the result of object.__str__() (if defined) or repr(object). encoding defaults to sys.getdefaultencoding(). errors defaults to 'strict'. # (copied from class doc) """ pass def __iter__(self, *args, **kwargs): # real signature unknown """ 返回迭代器對象 """ """ Implement iter(self). """ pass def __len__(self, *args, **kwargs): # real signature unknown """ 返回字符串的長度 """ """ Return len(self). """ pass def __le__(self, *args, **kwargs): # real signature unknown """ 比較左邊的字符串的ascii碼值是否小於等於右邊的ascii碼值 """ """ Return self<=value. """ pass def __lt__(self, *args, **kwargs): # real signature unknown """ 比較左邊的字符串的ascii碼值是否小於右邊的ascii碼值 """ """ Return self<value. """ pass def __mod__(self, *args, **kwargs): # real signature unknown """ Return self%value. """ pass def __mul__(self, *args, **kwargs): # real signature unknown """ 字符串的懲罰運算 """ """ Return self*value.n """ pass @staticmethod # known case of __new__ def __new__(*args, **kwargs): # real signature unknown """ Create and return a new object. See help(type) for accurate signature. """ pass def __ne__(self, *args, **kwargs): # real signature unknown """ x.__ne__(y) 如果x與y的值不相等，返回True,相等則返回False """ """ Return self!=value. """ pass def __repr__(self, *args, **kwargs): # real signature unknown """ 轉化爲解釋器可讀取的形式 """ """ Return repr(self). """ pass def __rmod__(self, *args, **kwargs): # real signature unknown """ Return value%self. """ pass def __rmul__(self, *args, **kwargs): # real signature unknown """ 字符串的乘法運算 """ """ Return self*value. """ pass def __sizeof__(self): # real signature unknown; restored from __doc__ """ 返回在內存中佔用的字節數 """ """ S.__sizeof__() -> size of S in memory, in bytes """ pass def __str__(self, *args, **kwargs): # real signature unknown """ 轉化成可讀取的形式 """ """ Return str(self). """ pass