Python數(shù)據(jù)類型詳解（一）字符串
更新時間：2016年05月08日 09:23:48 作者：aylin
簡單的說字符串String就是使用引號定義的一組可以包含數(shù)字，字母，符號（非特殊系統(tǒng)符號）的集合。今天我們就來詳細(xì)探討下Python數(shù)據(jù)類型中的字符串
一.基本數(shù)據(jù)類型
整數(shù)：int
字符串：str(注：\t等于一個tab鍵)
布爾值： bool
列表：list
列表用[]
元祖：tuple
元祖用（）
字典：dict
注：所有的數(shù)據(jù)類型都存在想對應(yīng)的類列里
二.字符串所有數(shù)據(jù)類型：
基本操作：
索引，切片，追加，刪除，長度，切片，循環(huán)，包含
class str(object):
"""
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'.
"""
def capitalize(self): # real signature unknown; restored from __doc__
"""
S.capitalize() -> str
Return a capitalized version of S, i.e. make the first character
have upper case and the rest lower case.（返回一個大寫版本的年代,即第一個字符，有大寫,其余小寫。）
"""
return ""
def casefold(self): # real signature unknown; restored from __doc__
"""
S.casefold() -> str
Return a version of S suitable for caseless comparisons.（返回一個版本的S適合caseless比較。）
"""
return ""
def center(self, width, fillchar=None): # real signature unknown; restored from __doc__
"""
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)（返回年代集中在一個字符串的長度寬度。填充使用指定的填充字符(默認(rèn)是一個空間)）
"""
return ""
def count(self, sub, start=None, end=None): # real signature unknown; restored from __doc__
"""
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.
（返回的數(shù)量重疊出現(xiàn)的子串子字符串(開始:結(jié)束)?？蛇x參數(shù)的開始和結(jié)束解釋為片符號。）
"""
return 0
def encode(self, encoding='utf-8', errors='strict'): # real signature unknown; restored from __doc__
"""
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 expandtabs(self, tabsize=8): # real signature unknown; restored from __doc__
"""
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.
（返回一個副本的年代,所有制表符使用空間擴(kuò)大。如果tabsize不是,一個標(biāo)簽大小8個字符。）
"""
return ""
def find(self, sub, start=None, end=None): # real signature unknown; restored from __doc__
"""
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.
（回報指數(shù)最低的年代找到子字符串的子,這樣的子是包含在S[開始:結(jié)束]?？蛇x參數(shù)中解釋為開始和結(jié)束符號。）
"""
return 0
def format(self, *args, **kwargs): # known special case of str.format
"""
S.format(*args, **kwargs) -> str
Return a formatted version of S, using substitutions from args and kwargs.
The substitutions are identified by braces ('{' and '}').
（返回一個格式化的年代,利用參數(shù)的替換和kwargs。替換被括號(“{”和“}”)。）
"""
pass
def format_map(self, mapping): # real signature unknown; restored from __doc__
"""
S.format_map(mapping) -> str
Return a formatted version of S, using substitutions from mapping.
The substitutions are identified by braces ('{' and '}').
（返回一個格式化的年代,利用映射的替換。替換被括號(“{”和“}”)。）
"""
return ""
def index(self, sub, start=None, end=None): # real signature unknown; restored from __doc__
"""
S.index(sub[, start[, end]]) -> int
Like S.find() but raise ValueError when the substring is not found.
（像S.find(),但沒有找到子字符串時提高ValueError）
"""
return 0
def isalnum(self): # real signature unknown; restored from __doc__
"""
S.isalnum() -> bool
Return True if all characters in S are alphanumeric
and there is at least one character in S, False otherwise.
（如果在年代所有的人物都是字母數(shù)字返回True和至少有一個角色年代,否則假。）
"""
return False
def isalpha(self): # real signature unknown; restored from __doc__
"""
S.isalpha() -> bool
Return True if all characters in S are alphabetic
and there is at least one character in S, False otherwise.
（如果在年代所有的人物都是字母返回True和至少有一個角色年代,否則假。）
"""
return False
def isdigit(self): # real signature unknown; restored from __doc__
"""
S.isdigit() -> bool
Return True if all characters in S are digits
and there is at least one character in S, False otherwise.
（返回True,如果在年代所有的人物都是數(shù)字和至少有一個角色年代,否則假。）
"""
return False
def islower(self): # real signature unknown; restored from __doc__
"""
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.
（返回True,如果所有S是小寫,下套管的字符至少有一個下套管在年代,否則假。）
"""
return False
def isnumeric(self): # real signature unknown; restored from __doc__
"""
S.isnumeric() -> bool
Return True if there are only numeric characters in S,
False otherwise.
（返回True,如果只有數(shù)字字符,否則錯誤。）
"""
return False
def isprintable(self): # real signature unknown; restored from __doc__
"""
S.isprintable() -> bool
Return True if all characters in S are considered
printable in repr() or S is empty, False otherwise.
（如果在年代所有的人物都是考慮返回True，可打印在repr()或年代是空的,否則假。）
"""
return False
def isspace(self): # real signature unknown; restored from __doc__
"""
S.isspace() -> bool
Return True if all characters in S are whitespace
and there is at least one character in S, False otherwise.
（返回True,如果在年代所有的人物都是空白和至少有一個角色年代,否則假。）
"""
return False
def istitle(self): # real signature unknown; restored from __doc__
"""
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.
（返回True,如果S titlecased字符串和至少有一個個性的年代,即上,可能只titlecase字符遵循外露的字符和小寫字符只下套管。否則返回假。）
"""
return False
def isupper(self): # real signature unknown; restored from __doc__
"""
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.
（返回True,如果所有S是大寫,下套管的字符至少有一個下套管在年代,否則假。）
"""
return False
def join(self, iterable): # real signature unknown; restored from __doc__
"""
S.join(iterable) -> str
Return a string which is the concatenation of the strings in the
iterable. The separator between elements is S.
（返回一個字符串的連接字符串iterable。元素之間的分隔符是S。）
"""
return ""
def ljust(self, width, fillchar=None): # real signature unknown; restored from __doc__
"""
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).
（返回年代左對齊的Unicode字符串的長度寬度。填充使用指定的填充字符(默認(rèn)值是一個空格)。）
"""
return ""
def lower(self): # real signature unknown; restored from __doc__
"""
S.lower() -> str
Return a copy of the string S converted to lowercase.
（返回的字符串轉(zhuǎn)換為小寫。）
"""
return ""
def lstrip(self, chars=None): # real signature unknown; restored from __doc__
"""
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.
（返回字符串的副本刪除前導(dǎo)空白。如果字符而不是沒有,刪除字符字符代替。）
"""
return ""
def partition(self, sep): # real signature unknown; restored from __doc__
"""
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.
（搜索分離器sep的年代,并返回之前的部分一樣,分隔符本身,后一部分。如果分隔符發(fā)現(xiàn),還和兩個空字符串。）
"""
pass
def replace(self, old, new, count=None): # real signature unknown; restored from __doc__
"""
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.
（返回一個年代出現(xiàn)的所有子字符串的副本老被新的取代。如果可選參數(shù)計數(shù),只替換第一計數(shù)。）
"""
return ""
def rfind(self, sub, start=None, end=None): # real signature unknown; restored from __doc__
"""
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.
（回報最高的指數(shù)在年代找到子字符串的子,這樣的子是包含在S[開始:結(jié)束]?？蛇x參數(shù)中解釋為開始和結(jié)束符號。）
"""
return 0
def rindex(self, sub, start=None, end=None): # real signature unknown; restored from __doc__
"""
S.rindex(sub[, start[, end]]) -> int
Like S.rfind() but raise ValueError when the substring is not found.
（像S.rfind(),但沒有找到子字符串時提高ValueError。）
"""
return 0
def rjust(self, width, fillchar=None): # real signature unknown; restored from __doc__
"""
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).
（返回右對齊的在一個字符串的長度寬度。填充使用指定的填充字符(默認(rèn)值是一個空格)）
"""
return ""
def rpartition(self, sep): # real signature unknown; restored from __doc__
"""
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.
（尋找分離器在年代,9月開始的年代,并返回之前的部分一樣,分離器本身,后一部分。如果沒有找到分隔符,返回兩個空字符串和年代。）
"""
pass
def rsplit(self, sep=None, maxsplit=-1): # real signature unknown; restored from __doc__
"""
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.
（返回一個列表的單詞,使用9月作為分隔符字符串,字符串的結(jié)束和開始工作到前面來。如果maxsplit,最多maxsplit分割完成。如果沒有指定9月,任何空白字符串是一個分隔符。）
"""
return []
def rstrip(self, chars=None): # real signature unknown; restored from __doc__
"""
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.
（返回一個字符串的副本年代尾隨空格移除。如果字符而不是沒有,刪除字符字符代替。）
"""
return ""
def split(self, sep=None, maxsplit=-1): # real signature unknown; restored from __doc__
"""
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.
（返回一個列表的單詞,使用9月作為
分隔符的字符串。如果maxsplit,最多maxsplit
分割完成。如果沒有指定9月或沒有,
空白字符串分隔符和空字符串
從結(jié)果中刪除。）
"""
return []
def splitlines(self, keepends=None): # real signature unknown; restored from __doc__
"""
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.（返回一個列表的行,行打破界限。換行符不包括在結(jié)果列表,除非keepends和真正的。）
"""
return []
def startswith(self, prefix, start=None, end=None): # real signature unknown; restored from __doc__
"""
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.
（返回True,如果年代始于指定的前綴,否則假。
可選的開始,測試年代開始在那個位置。
帶有可選結(jié)束,停止比較年代在那個位置。
前綴也可以嘗試一個元組的字符串。）
"""
return False
def strip(self, chars=None): # real signature unknown; restored from __doc__
"""
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.（返回字符串的副本與前導(dǎo)和尾隨空格移除。如果字符而不是沒有,刪除字符字符代替。）
"""
return ""
def swapcase(self): # real signature unknown; restored from __doc__
"""
S.swapcase() -> str
Return a copy of S with uppercase characters converted to lowercase
and vice versa.（返回一個副本的年代大寫字符轉(zhuǎn)換為小寫反之亦然）
"""
return ""
def title(self): # real signature unknown; restored from __doc__
"""
S.title() -> str
Return a titlecased version of S, i.e. words start with title case
characters, all remaining cased characters have lower case.（返回一個titlecased版本的年代,即單詞從標(biāo)題開始字符,所有剩余的下套管字符小寫）
"""
return ""
def translate(self, table): # real signature unknown; restored from __doc__
"""
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.（返回的字符串的每個字符被映射通過給定的轉(zhuǎn)換表。
表必須實現(xiàn)通過__getitem__查找/索引,例如字典或列表,Unicode依次映射到Unicode序數(shù)、字符串或沒有。
如果此操作提出了LookupError,字符保持不變）
"""
return ""
def upper(self): # real signature unknown; restored from __doc__
"""
S.upper() -> str
Return a copy of S converted to uppercase.（返回一個副本年代轉(zhuǎn)換為大寫）
"""
return ""
def zfill(self, width): # real signature unknown; restored from __doc__
"""
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.（墊一個數(shù)字字符串與0年代在左邊,填補(bǔ)一個字段指定的寬度。字符串年代不會截斷。）
"""
return ""
def __add__(self, *args, **kwargs): # real signature unknown
""" Return self+value. """
pass
def __contains__(self, *args, **kwargs): # real signature unknown
""" Return key in self. """
pass
def __eq__(self, *args, **kwargs): # real signature unknown
""" Return self==value. """
pass
def __format__(self, format_spec): # real signature unknown; restored from __doc__
"""
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
""" Return getattr(self, name). """
pass
def __getitem__(self, *args, **kwargs): # real signature unknown
""" Return self[key]. """
pass
def __getnewargs__(self, *args, **kwargs): # real signature unknown
pass
def __ge__(self, *args, **kwargs): # real signature unknown
""" Return self>=value. """
pass
def __gt__(self, *args, **kwargs): # real signature unknown
""" Return self>value. """
pass
def __hash__(self, *args, **kwargs): # real signature unknown
""" Return hash(self). """
pass
def __init__(self, value='', encoding=None, errors='strict'): # known special case of str.__init__
"""
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
""" Implement iter(self). """
pass
def __len__(self, *args, **kwargs): # real signature unknown
""" Return len(self). """
pass
def __le__(self, *args, **kwargs): # real signature unknown
""" Return self<=value. """
pass
def __lt__(self, *args, **kwargs): # real signature unknown
""" Return self<value. """
pass
def __mod__(self, *args, **kwargs): # real signature unknown
""" Return self%value. """
pass
def __mul__(self, *args, **kwargs): # real signature unknown
""" 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
""" Return self!=value. """
pass
def __repr__(self, *args, **kwargs): # real signature unknown
""" Return repr(self). """
pass
def __rmod__(self, *args, **kwargs): # real signature unknown
""" Return value%self. """
pass
def __rmul__(self, *args, **kwargs): # real signature unknown
""" Return self*value. """
pass
def __sizeof__(self): # real signature unknown; restored from __doc__
""" S.__sizeof__() -> size of S in memory, in bytes """
pass
def __str__(self, *args, **kwargs): # real signature unknown
""" Return str(self). """
pass
class super(object):
"""
super() -> same as super(__class__, <first argument>)
super(type) -> unbound super object
super(type, obj) -> bound super object; requires isinstance(obj, type)
super(type, type2) -> bound super object; requires issubclass(type2, type)
Typical use to call a cooperative superclass method:
class C(B):
def meth(self, arg):
super().meth(arg)
This works for class methods too:
class C(B):
@classmethod
def cmeth(cls, arg):
super().cmeth(arg)
"""
def __getattribute__(self, *args, **kwargs): # real signature unknown
""" Return getattr(self, name). """
pass
def __get__(self, *args, **kwargs): # real signature unknown
""" Return an attribute of instance, which is of type owner. """
pass
def __init__(self, type1=None, type2=None): # known special case of super.__init__
"""
super() -> same as super(__class__, <first argument>)
super(type) -> unbound super object
super(type, obj) -> bound super object; requires isinstance(obj, type)
super(type, type2) -> bound super object; requires issubclass(type2, type)
Typical use to call a cooperative superclass method:
class C(B):
def meth(self, arg):
super().meth(arg)
This works for class methods too:
class C(B):
@classmethod
def cmeth(cls, arg):
super().cmeth(arg)
# (copied from class doc)
"""
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 __repr__(self, *args, **kwargs): # real signature unknown
""" Return repr(self). """
pass
__self_class__ = property(lambda self: type(object))
"""the type of the instance invoking super(); may be None
:type: type
"""
__self__ = property(lambda self: type(object))
"""the instance invoking super(); may be None
:type: type
"""
__thisclass__ = property(lambda self: type(object))
"""the class invoking super()
:type: type
"""
class SyntaxWarning(Warning):
""" Base class for warnings about dubious syntax. """
def __init__(self, *args, **kwargs): # real signature unknown
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
class SystemError(Exception):
"""
Internal error in the Python interpreter.
Please report this to the Python maintainer, along with the traceback,
the Python version, and the hardware/OS platform and version.
"""
def __init__(self, *args, **kwargs): # real signature unknown
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
class SystemExit(BaseException):
""" Request to exit from the interpreter. """
def __init__(self, *args, **kwargs): # real signature unknown
pass
code = property(lambda self: object(), lambda self, v: None, lambda self: None) # default
"""exception code"""
class TabError(IndentationError):
""" Improper mixture of spaces and tabs. """
def __init__(self, *args, **kwargs): # real signature unknown
pass
class TimeoutError(OSError):
""" Timeout expired. """
def __init__(self, *args, **kwargs): # real signature unknown
pass
class tuple(object):
"""
tuple() -> empty tuple
tuple(iterable) -> tuple initialized from iterable's items
If the argument is a tuple, the return value is the same object.
"""
def count(self, value): # real signature unknown; restored from __doc__
""" T.count(value) -> integer -- return number of occurrences of value """
return 0
def index(self, value, start=None, stop=None): # real signature unknown; restored from __doc__
"""
T.index(value, [start, [stop]]) -> integer -- return first index of value.
Raises ValueError if the value is not present.
"""
return 0
def __add__(self, *args, **kwargs): # real signature unknown
""" Return self+value. """
pass
def __contains__(self, *args, **kwargs): # real signature unknown
""" Return key in self. """
pass
def __eq__(self, *args, **kwargs): # real signature unknown
""" Return self==value. """
pass
def __getattribute__(self, *args, **kwargs): # real signature unknown
""" Return getattr(self, name). """
pass
def __getitem__(self, *args, **kwargs): # real signature unknown
""" Return self[key]. """
pass
def __getnewargs__(self, *args, **kwargs): # real signature unknown
pass
def __ge__(self, *args, **kwargs): # real signature unknown
""" Return self>=value. """
pass
def __gt__(self, *args, **kwargs): # real signature unknown
""" Return self>value. """
pass
def __hash__(self, *args, **kwargs): # real signature unknown
""" Return hash(self). """
pass
def __init__(self, seq=()): # known special case of tuple.__init__
"""
tuple() -> empty tuple
tuple(iterable) -> tuple initialized from iterable's items
If the argument is a tuple, the return value is the same object.
# (copied from class doc)
"""
pass
def __iter__(self, *args, **kwargs): # real signature unknown
""" Implement iter(self). """
pass
def __len__(self, *args, **kwargs): # real signature unknown
""" Return len(self). """
pass
def __le__(self, *args, **kwargs): # real signature unknown
""" Return self<=value. """
pass
def __lt__(self, *args, **kwargs): # real signature unknown
""" Return self<value. """
pass
def __mul__(self, *args, **kwargs): # real signature unknown
""" 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
""" Return self!=value. """
pass
def __repr__(self, *args, **kwargs): # real signature unknown
""" Return repr(self). """
pass
def __rmul__(self, *args, **kwargs): # real signature unknown
""" Return self*value. """
pass
class type(object):
"""
type(object_or_name, bases, dict)
type(object) -> the object's type
type(name, bases, dict) -> a new type
"""
def mro(self): # real signature unknown; restored from __doc__
"""
mro() -> list
return a type's method resolution order
"""
return []
def __call__(self, *args, **kwargs): # real signature unknown
""" Call self as a function. """
pass
def __delattr__(self, *args, **kwargs): # real signature unknown
""" Implement delattr(self, name). """
pass
def __dir__(self): # real signature unknown; restored from __doc__
"""
__dir__() -> list
specialized __dir__ implementation for types
"""
return []
def __getattribute__(self, *args, **kwargs): # real signature unknown
""" Return getattr(self, name). """
pass
def __init__(cls, what, bases=None, dict=None): # known special case of type.__init__
"""
type(object_or_name, bases, dict)
type(object) -> the object's type
type(name, bases, dict) -> a new type
# (copied from class doc)
"""
pass
def __instancecheck__(self): # real signature unknown; restored from __doc__
"""
__instancecheck__() -> bool
check if an object is an instance
"""
return False
@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 __prepare__(self): # real signature unknown; restored from __doc__
"""
__prepare__() -> dict
used to create the namespace for the class statement
"""
return {}
def __repr__(self, *args, **kwargs): # real signature unknown
""" Return repr(self). """
pass
def __setattr__(self, *args, **kwargs): # real signature unknown
""" Implement setattr(self, name, value). """
pass
def __sizeof__(self): # real signature unknown; restored from __doc__
"""
__sizeof__() -> int
return memory consumption of the type object
"""
return 0
def __subclasscheck__(self): # real signature unknown; restored from __doc__
"""
__subclasscheck__() -> bool
check if a class is a subclass
"""
return False
def __subclasses__(self): # real signature unknown; restored from __doc__
""" __subclasses__() -> list of immediate subclasses """
return []
__abstractmethods__ = property(lambda self: object(), lambda self, v: None, lambda self: None) # default
__bases__ = (
object,
)
__base__ = object
__basicsize__ = 864
__dictoffset__ = 264
__dict__ = None # (!) real value is ''
__flags__ = -2146675712
__itemsize__ = 40
__mro__ = (
None, # (!) forward: type, real value is ''
object,
)
__name__ = 'type'
__qualname__ = 'type'
__text_signature__ = None
__weakrefoffset__ = 368
class TypeError(Exception):
""" Inappropriate argument type. """
def __init__(self, *args, **kwargs): # real signature unknown
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
class UnboundLocalError(NameError):
""" Local name referenced but not bound to a value. """
def __init__(self, *args, **kwargs): # real signature unknown
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
class ValueError(Exception):
""" Inappropriate argument value (of correct type). """
def __init__(self, *args, **kwargs): # real signature unknown
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
class UnicodeError(ValueError):
""" Unicode related error. """
def __init__(self, *args, **kwargs): # real signature unknown
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
class UnicodeDecodeError(UnicodeError):
""" Unicode decoding error. """
def __init__(self, *args, **kwargs): # real signature unknown
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 __str__(self, *args, **kwargs): # real signature unknown
""" Return str(self). """
pass
encoding = property(lambda self: object(), lambda self, v: None, lambda self: None) # default
"""exception encoding"""
end = property(lambda self: object(), lambda self, v: None, lambda self: None) # default
"""exception end"""
object = property(lambda self: object(), lambda self, v: None, lambda self: None) # default
"""exception object"""
reason = property(lambda self: object(), lambda self, v: None, lambda self: None) # default
"""exception reason"""
start = property(lambda self: object(), lambda self, v: None, lambda self: None) # default
"""exception start"""
class UnicodeEncodeError(UnicodeError):
""" Unicode encoding error. """
def __init__(self, *args, **kwargs): # real signature unknown
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 __str__(self, *args, **kwargs): # real signature unknown
""" Return str(self). """
pass
encoding = property(lambda self: object(), lambda self, v: None, lambda self: None) # default
"""exception encoding"""
end = property(lambda self: object(), lambda self, v: None, lambda self: None) # default
"""exception end"""
object = property(lambda self: object(), lambda self, v: None, lambda self: None) # default
"""exception object"""
reason = property(lambda self: object(), lambda self, v: None, lambda self: None) # default
"""exception reason"""
start = property(lambda self: object(), lambda self, v: None, lambda self: None) # default
"""exception start"""
class UnicodeTranslateError(UnicodeError):
""" Unicode translation error. """
def __init__(self, *args, **kwargs): # real signature unknown
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 __str__(self, *args, **kwargs): # real signature unknown
""" Return str(self). """
pass
encoding = property(lambda self: object(), lambda self, v: None, lambda self: None) # default
"""exception encoding"""
end = property(lambda self: object(), lambda self, v: None, lambda self: None) # default
"""exception end"""
object = property(lambda self: object(), lambda self, v: None, lambda self: None) # default
"""exception object"""
reason = property(lambda self: object(), lambda self, v: None, lambda self: None) # default
"""exception reason"""
start = property(lambda self: object(), lambda self, v: None, lambda self: None) # default
"""exception start"""
class UnicodeWarning(Warning):
"""
Base class for warnings about Unicode related problems, mostly
related to conversion problems.
"""
def __init__(self, *args, **kwargs): # real signature unknown
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
class UserWarning(Warning):
""" Base class for warnings generated by user code. """
def __init__(self, *args, **kwargs): # real signature unknown
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
class ZeroDivisionError(ArithmeticError):
""" Second argument to a division or modulo operation was zero. """
def __init__(self, *args, **kwargs): # real signature unknown
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
class zip(object):
"""
zip(iter1 [,iter2 [...]]) --> zip object
Return a zip object whose .__next__() method returns a tuple where
the i-th element comes from the i-th iterable argument. The .__next__()
method continues until the shortest iterable in the argument sequence
is exhausted and then it raises StopIteration.
"""
def __getattribute__(self, *args, **kwargs): # real signature unknown
""" Return getattr(self, name). """
pass
def __init__(self, iter1, iter2=None, *some): # real signature unknown; restored from __doc__
pass
def __iter__(self, *args, **kwargs): # real signature unknown
""" Implement iter(self). """
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 __next__(self, *args, **kwargs): # real signature unknown
""" Implement next(self). """
pass
def __reduce__(self, *args, **kwargs): # real signature unknown
""" Return state information for pickling. """
pass
class __loader__(object):
"""
Meta path import for built-in modules.
All methods are either class or static methods to avoid the need to
instantiate the class.
"""
def create_module(self, *args, **kwargs): # real signature unknown
""" Create a built-in module """
pass
def exec_module(self, *args, **kwargs): # real signature unknown
""" Exec a built-in module """
pass
def find_module(self, *args, **kwargs): # real signature unknown
"""
Find the built-in module.
If 'path' is ever specified then the search is considered a failure.
This method is deprecated. Use find_spec() instead.
"""
pass
def find_spec(self, *args, **kwargs): # real signature unknown
pass
def get_code(self, *args, **kwargs): # real signature unknown
""" Return None as built-in modules do not have code objects. """
pass
def get_source(self, *args, **kwargs): # real signature unknown
""" Return None as built-in modules do not have source code. """
pass
def is_package(self, *args, **kwargs): # real signature unknown
""" Return False as built-in modules are never packages. """
pass
def load_module(self, *args, **kwargs): # real signature unknown
"""
Load the specified module into sys.modules and return it.
This method is deprecated. Use loader.exec_module instead.
"""
pass
def module_repr(module): # reliably restored by inspect
"""
Return repr for the module.
The method is deprecated. The import machinery does the job itself.
"""
pass
def __init__(self, *args, **kwargs): # real signature unknown
pass
__weakref__ = property(lambda self: object(), lambda self, v: None, lambda self: None) # default
"""list of weak references to the object (if defined)"""
__dict__ = None # (!) real value is ''
# variables with complex values
Ellipsis = None # (!) real value is ''
NotImplemented = None # (!) real value is ''
__spec__ = None # (!) real value is ''
三.所有字符串?dāng)?shù)據(jù)類型舉例
#變量名字變大寫
tmp = "zhangyanlin"
tmp_new = tmp.upper()
print(tmp_new)
# 輸出所有字符定義的所有類型
tmp.upper()
print(dir(tmp))
#['__add__', '__class__', '__contains__', '__delattr__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__getitem__', '__getnewargs__', '__gt__', '__hash__', '__init__', '__iter__', '__le__', '__len__', '__lt__', '__mod__', '__mul__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__rmod__', '__rmul__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', 'capitalize', 'casefold', 'center', 'count', 'encode', 'endswith', 'expandtabs', 'find', 'format', 'format_map', 'index', 'isalnum', 'isalpha', 'isdecimal', 'isdigit', 'isidentifier', 'islower', 'isnumeric', 'isprintable', 'isspace', 'istitle', 'isupper', 'join', 'ljust', 'lower', 'lstrip', 'maketrans', 'partition', 'replace', 'rfind', 'rindex', 'rjust', 'rpartition', 'rsplit', 'rstrip', 'split', 'splitlines', 'startswith', 'strip', 'swapcase', 'title', 'translate', 'upper', 'zfill']
#把首字母變成大寫
u1 = "zhang"
u2 = u1.capitalize()
print(u2)
#20定義20個位，不夠用_補(bǔ)全。
u1 = "zhang"
u2 = u1.center(20 ,'_')
print(u2)
#看zh在前10位出現(xiàn)了幾次
u1 = "zhangyanlin is zhgod"
u2 = u1.count('zh',0, 10)
print(u2)
#獲取字符串中大于等于0的位置，小于2的位置
u1 = "zhang"
print(u1.endswith('h',0,2))
#將tab轉(zhuǎn)換成空格
u1 = "zhang\t123"
print(u1.expandtabs(20))
#找位數(shù),相同只能找第一個出現(xiàn)的，沒有想應(yīng)得會反饋-1
u1 = "zhang hello"
print(u1.find('h'))
#站位符0和1是代表站位符
u1 = "name {0}, age {1}"
print(u1.format("zhang",18))
u1 = " zhang is yan "
#判斷是否是字母
print(u1.isalpha())
#判斷是否是數(shù)字
print(u1.isdigit())
#判斷是否是字母和數(shù)字
print(u1.isalnum())
#判斷是否是小寫
print(u1.islower())
#判斷是否是空格
print(u1.isspace())
#判斷是不是標(biāo)題
print(u1.istitle())
#判斷是不是全部都是大寫
print(u1.isupper())
#把列表里的內(nèi)容連接一起
print("_".join(u1))
#內(nèi)容左對齊，右側(cè)填充
print(u1.ljust(1))
#內(nèi)容變小寫
print(u1.lower())
#移除左邊的空格
print(u1.lstrip())
#移除右邊的空格
print(u1.rstrip())
#把有空格的內(nèi)容分割,變成元祖類型，從左找；rpartition從右開始分割
print(u1.partition('is'))
#替換,后面可以加替換幾個，從左往右
print(u1.replace('zh','ZH'))
#找到一個字符分割,從右，split從左分割
print(u1.rsplit('a',1))
#是否以某個字符串開始開始
print(u1.startswith('z'))
#移除兩邊空格（strip）
print(u1.strip())
#大寫變小寫，小寫變大寫
print(u1.swapcase())
#變大寫（upper）
print(u1.upper())
四.索引
u1 = "zhangyanlin" print(u1[0]) print(u1[1]) print(u1[2]) print(u1[3]) print(u1[4]) print(u1[5])
五.切片
#切出zhan,注：0是代表第一位，4代表小于四，知道第三個數(shù) u1 = "zhangyanlin" print(u1[0:4])
六.循環(huán)切片
1.while使用
u1 = "zhangyanlin" u2 = 0 while u2 < len(u1): print(u1[u2]) u2+=1
2.for使用
#循環(huán)切片
u1 = "zhangyanlin"
for u2 in u1:
print(u2)
#循環(huán)切片，輸出除了y
u1 ="zhangyanlin"
for u2 in u1:
if u2 =="y":
continue
print(u2)
#循環(huán)切片，輸出到y(tǒng)后不執(zhí)行
u1 ="zhangyanlin"
for u2 in u1:
if u2 =="y":
break
print(u2)
相關(guān)文章
Python 多好用不用多說，大家看看自己用的語言就知道了。但是 Python 隱藏的高級功能你都 get 了嗎？本文中，作者列舉了 Python 中五種略高級的特征以及它們的使用方法，快來一探究竟吧！2020-09-09
在本篇文章里小編給大家整理的是一篇關(guān)于python中GIL的原理及用法總結(jié)內(nèi)容，有需要的朋友們可以學(xué)習(xí)參考下。2021-03-03
基于opencv和pillow實現(xiàn)人臉識別系統(tǒng)(附demo)
人臉識別就是一個程序能識別給定圖像或視頻中的人臉，本文主要介紹了opencv和pillow實現(xiàn)人臉識別系統(tǒng)，本文不涉及分類器、訓(xùn)練識別器等算法原理，感興趣的可以了解一下2021-11-11
這篇文章主要介紹了Python操作SQLite簡明教程,簡單明了的入門教程,包含連接、建表、增刪修查等例子,需要的朋友可以參考下2014-07-07
django執(zhí)行原始查詢sql,并返回Dict字典例子
這篇文章主要介紹了django執(zhí)行原始查詢sql,并返回Dict字典例子，具有很好的參考價值，希望對大家有所幫助。一起跟隨小編過來看看吧2020-04-04
基于Python實現(xiàn)實時監(jiān)控CPU使用率
這篇文章主要為大家介紹了一款手寫編程代碼的小腳本，能夠輕松在界面上展示：利用Python實時監(jiān)控CPU使用率，隨時展現(xiàn)。也無需下載管理軟件，感興趣的可以了解一下2022-04-04
Python面向?qū)ο蟪绦蛟O(shè)計OOP深入分析【構(gòu)造函數(shù),組合類,工具類等】
這篇文章主要介紹了Python面向?qū)ο蟪绦蛟O(shè)計OOP,較為詳細(xì)的深入分析了Python面向?qū)ο蟮臉?gòu)造函數(shù),組合類,工具類等相關(guān)概念、使用方法及操作注意事項,需要的朋友可以參考下2019-01-01
這篇文章主要為大家介紹了python?unicodedata模塊用法示例，有需要的朋友可以借鑒參考下，希望能夠有所幫助，祝大家多多進(jìn)步，早日升職加薪2022-06-06
插值法是一種數(shù)學(xué)方法，用于在已知數(shù)據(jù)點(diǎn)（離散數(shù)據(jù)）之間插入數(shù)據(jù)，以生成連續(xù)的函數(shù)曲線，而格朗日插值法是一種多項式插值法。本文就來用Python實現(xiàn)拉格朗日插值法，希望對大家有所幫助2023-02-02
GPU排隊腳本實現(xiàn)空閑觸發(fā)python腳本實現(xiàn)示例
有的服務(wù)器是多用戶使用，GPU的資源常常被占據(jù)著，很可能在夜間GPU空閑了，但來不及運(yùn)行自己的腳本。如果沒有和別人共享服務(wù)器的話，自己的多個程序想排隊使用GPU，也可以用這個腳本2021-11-11