Python数据类型详解（一）字符串
一.基本数据类型
整数：int
字符串：str(注：\t等于一个tab键)
布尔值：bool
列表：list
列表用[]
元祖：tuple
元祖用（）
字典：dict
注：所有的数据类型都存在想对应的类列里
二.字符串所有数据类型：
基本操作：
索引，切片，追加，删除，长度，切片，循环，包含
classstr(object):
"""
str(object='')->str
str(bytes_or_buffer[,encoding[,errors]])->str
Createanewstringobjectfromthegivenobject.Ifencodingor
errorsisspecified,thentheobjectmustexposeadatabuffer
thatwillbedecodedusingthegivenencodinganderrorhandler.
Otherwise,returnstheresultofobject.__str__()(ifdefined)
orrepr(object).
encodingdefaultstosys.getdefaultencoding().
errorsdefaultsto'strict'.
"""
defcapitalize(self):#realsignatureunknown;restoredfrom__doc__
"""
S.capitalize()->str
ReturnacapitalizedversionofS,i.e.makethefirstcharacter
haveuppercaseandtherestlowercase.（返回一个大写版本的年代,即第一个字符，有大写,其余小写。）
"""
return""
defcasefold(self):#realsignatureunknown;restoredfrom__doc__
"""
S.casefold()->str
ReturnaversionofSsuitableforcaselesscomparisons.（返回一个版本的S适合caseless比较。）
"""
return""
defcenter(self,width,fillchar=None):#realsignatureunknown;restoredfrom__doc__
"""
S.center(width[,fillchar])->str
ReturnScenteredinastringoflengthwidth.Paddingis
doneusingthespecifiedfillcharacter(defaultisaspace)（返回年代集中在一个字符串的长度宽度。填充使用指定的填充字符(默认是一个空间)）
"""
return""
defcount(self,sub,start=None,end=None):#realsignatureunknown;restoredfrom__doc__
"""
S.count(sub[,start[,end]])->int
Returnthenumberofnon-overlappingoccurrencesofsubstringsubin
stringS[start:end].Optionalargumentsstartandendare
interpretedasinslicenotation.
（返回的数量重叠出现的子串子字符串(开始:结束)。可选参数的开始和结束解释为片符号。）
"""
return0
defencode(self,encoding='utf-8',errors='strict'):#realsignatureunknown;restoredfrom__doc__
"""
S.encode(encoding='utf-8',errors='strict')->bytes
EncodeSusingthecodecregisteredforencoding.Defaultencoding
is'utf-8'.errorsmaybegiventosetadifferenterror
handlingscheme.Defaultis'strict'meaningthatencodingerrorsraise
aUnicodeEncodeError.Otherpossiblevaluesare'ignore','replace'and
'xmlcharrefreplace'aswellasanyothernameregisteredwith
codecs.register_errorthatcanhandleUnicodeEncodeErrors.
"""
returnb""
defexpandtabs(self,tabsize=8):#realsignatureunknown;restoredfrom__doc__
"""
S.expandtabs(tabsize=8)->str
ReturnacopyofSwherealltabcharactersareexpandedusingspaces.
Iftabsizeisnotgiven,atabsizeof8charactersisassumed.
（返回一个副本的年代,所有制表符使用空间扩大。如果tabsize不是,一个标签大小8个字符。）
"""
return""
deffind(self,sub,start=None,end=None):#realsignatureunknown;restoredfrom__doc__
"""
S.find(sub[,start[,end]])->int
ReturnthelowestindexinSwheresubstringsubisfound,
suchthatsubiscontainedwithinS[start:end].Optional
argumentsstartandendareinterpretedasinslicenotation.
Return-1onfailure.
（回报指数最低的年代找到子字符串的子,这样的子是包含在S[开始:结束]。可选参数中解释为开始和结束符号。）
"""
return0
defformat(self,*args,**kwargs):#knownspecialcaseofstr.format
"""
S.format(*args,**kwargs)->str
ReturnaformattedversionofS,usingsubstitutionsfromargsandkwargs.
Thesubstitutionsareidentifiedbybraces('{'and'}').
（返回一个格式化的年代,利用参数的替换和kwargs。替换被括号(“{”和“}”)。）
"""
pass
defformat_map(self,mapping):#realsignatureunknown;restoredfrom__doc__
"""
S.format_map(mapping)->str
ReturnaformattedversionofS,usingsubstitutionsfrommapping.
Thesubstitutionsareidentifiedbybraces('{'and'}').
（返回一个格式化的年代,利用映射的替换。替换被括号(“{”和“}”)。）
"""
return""
defindex(self,sub,start=None,end=None):#realsignatureunknown;restoredfrom__doc__
"""
S.index(sub[,start[,end]])->int
LikeS.find()butraiseValueErrorwhenthesubstringisnotfound.
（像S.find(),但没有找到子字符串时提高ValueError）
"""
return0
defisalnum(self):#realsignatureunknown;restoredfrom__doc__
"""
S.isalnum()->bool
ReturnTrueifallcharactersinSarealphanumeric
andthereisatleastonecharacterinS,Falseotherwise.
（如果在年代所有的人物都是字母数字返回True和至少有一个角色年代,否则假。）
"""
returnFalse
defisalpha(self):#realsignatureunknown;restoredfrom__doc__
"""
S.isalpha()->bool
ReturnTrueifallcharactersinSarealphabetic
andthereisatleastonecharacterinS,Falseotherwise.
（如果在年代所有的人物都是字母返回True和至少有一个角色年代,否则假。）
"""
returnFalse
defisdigit(self):#realsignatureunknown;restoredfrom__doc__
"""
S.isdigit()->bool
ReturnTrueifallcharactersinSaredigits
andthereisatleastonecharacterinS,Falseotherwise.
（返回True,如果在年代所有的人物都是数字和至少有一个角色年代,否则假。）
"""
returnFalse
defislower(self):#realsignatureunknown;restoredfrom__doc__
"""
S.islower()->bool
ReturnTrueifallcasedcharactersinSarelowercaseandthereis
atleastonecasedcharacterinS,Falseotherwise.
（返回True,如果所有S是小写,下套管的字符至少有一个下套管在年代,否则假。）
"""
returnFalse
defisnumeric(self):#realsignatureunknown;restoredfrom__doc__
"""
S.isnumeric()->bool
ReturnTrueifthereareonlynumericcharactersinS,
Falseotherwise.
（返回True,如果只有数字字符,否则错误。）
"""
returnFalse
defisprintable(self):#realsignatureunknown;restoredfrom__doc__
"""
S.isprintable()->bool
ReturnTrueifallcharactersinSareconsidered
printableinrepr()orSisempty,Falseotherwise.
（如果在年代所有的人物都是考虑返回True，可打印在repr()或年代是空的,否则假。）
"""
returnFalse
defisspace(self):#realsignatureunknown;restoredfrom__doc__
"""
S.isspace()->bool
ReturnTrueifallcharactersinSarewhitespace
andthereisatleastonecharacterinS,Falseotherwise.
（返回True,如果在年代所有的人物都是空白和至少有一个角色年代,否则假。）
"""
returnFalse
defistitle(self):#realsignatureunknown;restoredfrom__doc__
"""
S.istitle()->bool
ReturnTrueifSisatitlecasedstringandthereisatleastone
characterinS,i.e.upper-andtitlecasecharactersmayonly
followuncasedcharactersandlowercasecharactersonlycasedones.
ReturnFalseotherwise.
（返回True,如果Stitlecased字符串和至少有一个个性的年代,即上,可能只titlecase字符遵循外露的字符和小写字符只下套管。否则返回假。）
"""
returnFalse
defisupper(self):#realsignatureunknown;restoredfrom__doc__
"""
S.isupper()->bool
ReturnTrueifallcasedcharactersinSareuppercaseandthereis
atleastonecasedcharacterinS,Falseotherwise.
（返回True,如果所有S是大写,下套管的字符至少有一个下套管在年代,否则假。）
"""
returnFalse
defjoin(self,iterable):#realsignatureunknown;restoredfrom__doc__
"""
S.join(iterable)->str
Returnastringwhichistheconcatenationofthestringsinthe
iterable.TheseparatorbetweenelementsisS.
（返回一个字符串的连接字符串iterable。元素之间的分隔符是S。）
"""
return""
defljust(self,width,fillchar=None):#realsignatureunknown;restoredfrom__doc__
"""
S.ljust(width[,fillchar])->str
ReturnSleft-justifiedinaUnicodestringoflengthwidth.Paddingis
doneusingthespecifiedfillcharacter(defaultisaspace).
（返回年代左对齐的Unicode字符串的长度宽度。填充使用指定的填充字符(默认值是一个空格)。）
"""
return""
deflower(self):#realsignatureunknown;restoredfrom__doc__
"""
S.lower()->str
ReturnacopyofthestringSconvertedtolowercase.
（返回的字符串转换为小写。）
"""
return""
deflstrip(self,chars=None):#realsignatureunknown;restoredfrom__doc__
"""
S.lstrip([chars])->str
ReturnacopyofthestringSwithleadingwhitespaceremoved.
IfcharsisgivenandnotNone,removecharactersincharsinstead.
（返回字符串的副本删除前导空白。如果字符而不是没有,删除字符字符代替。）
"""
return""
defpartition(self,sep):#realsignatureunknown;restoredfrom__doc__
"""
S.partition(sep)->(head,sep,tail)
SearchfortheseparatorsepinS,andreturnthepartbeforeit,
theseparatoritself,andthepartafterit.Iftheseparatorisnot
found,returnSandtwoemptystrings.
（搜索分离器sep的年代,并返回之前的部分一样,分隔符本身,后一部分。如果分隔符发现,还和两个空字符串。）
"""
pass
defreplace(self,old,new,count=None):#realsignatureunknown;restoredfrom__doc__
"""
S.replace(old,new[,count])->str
ReturnacopyofSwithalloccurrencesofsubstring
oldreplacedbynew.Iftheoptionalargumentcountis
given,onlythefirstcountoccurrencesarereplaced.
（返回一个年代出现的所有子字符串的副本老被新的取代。如果可选参数计数,只替换第一计数。）
"""
return""
defrfind(self,sub,start=None,end=None):#realsignatureunknown;restoredfrom__doc__
"""
S.rfind(sub[,start[,end]])->int
ReturnthehighestindexinSwheresubstringsubisfound,
suchthatsubiscontainedwithinS[start:end].Optional
argumentsstartandendareinterpretedasinslicenotation.
Return-1onfailure.
（回报最高的指数在年代找到子字符串的子,这样的子是包含在S[开始:结束]。可选参数中解释为开始和结束符号。）
"""
return0
defrindex(self,sub,start=None,end=None):#realsignatureunknown;restoredfrom__doc__
"""
S.rindex(sub[,start[,end]])->int
LikeS.rfind()butraiseValueErrorwhenthesubstringisnotfound.
（像S.rfind(),但没有找到子字符串时提高ValueError。）
"""
return0
defrjust(self,width,fillchar=None):#realsignatureunknown;restoredfrom__doc__
"""
S.rjust(width[,fillchar])->str
ReturnSright-justifiedinastringoflengthwidth.Paddingis
doneusingthespecifiedfillcharacter(defaultisaspace).
（返回右对齐的在一个字符串的长度宽度。填充使用指定的填充字符(默认值是一个空格)）
"""
return""
defrpartition(self,sep):#realsignatureunknown;restoredfrom__doc__
"""
S.rpartition(sep)->(head,sep,tail)
SearchfortheseparatorsepinS,startingattheendofS,andreturn
thepartbeforeit,theseparatoritself,andthepartafterit.Ifthe
separatorisnotfound,returntwoemptystringsandS.
（寻找分离器在年代,9月开始的年代,并返回之前的部分一样,分离器本身,后一部分。如果没有找到分隔符,返回两个空字符串和年代。）
"""
pass
defrsplit(self,sep=None,maxsplit=-1):#realsignatureunknown;restoredfrom__doc__
"""
S.rsplit(sep=None,maxsplit=-1)->listofstrings
ReturnalistofthewordsinS,usingsepasthe
delimiterstring,startingattheendofthestringand
workingtothefront.Ifmaxsplitisgiven,atmostmaxsplit
splitsaredone.Ifsepisnotspecified,anywhitespacestring
isaseparator.
（返回一个列表的单词,使用9月作为分隔符字符串,字符串的结束和开始工作到前面来。如果maxsplit,最多maxsplit分割完成。如果没有指定9月,任何空白字符串是一个分隔符。）
"""
return[]
defrstrip(self,chars=None):#realsignatureunknown;restoredfrom__doc__
"""
S.rstrip([chars])->str
ReturnacopyofthestringSwithtrailingwhitespaceremoved.
IfcharsisgivenandnotNone,removecharactersincharsinstead.
（返回一个字符串的副本年代尾随空格移除。如果字符而不是没有,删除字符字符代替。）
"""
return""
defsplit(self,sep=None,maxsplit=-1):#realsignatureunknown;restoredfrom__doc__
"""
S.split(sep=None,maxsplit=-1)->listofstrings
ReturnalistofthewordsinS,usingsepasthe
delimiterstring.Ifmaxsplitisgiven,atmostmaxsplit
splitsaredone.IfsepisnotspecifiedorisNone,any
whitespacestringisaseparatorandemptystringsare
removedfromtheresult.
（返回一个列表的单词,使用9月作为
分隔符的字符串。如果maxsplit,最多maxsplit
分割完成。如果没有指定9月或没有,
空白字符串分隔符和空字符串
从结果中删除。）
"""
return[]
defsplitlines(self,keepends=None):#realsignatureunknown;restoredfrom__doc__
"""
S.splitlines([keepends])->listofstrings
ReturnalistofthelinesinS,breakingatlineboundaries.
Linebreaksarenotincludedintheresultinglistunlesskeepends
isgivenandtrue.（返回一个列表的行,行打破界限。换行符不包括在结果列表,除非keepends和真正的。）
"""
return[]
defstartswith(self,prefix,start=None,end=None):#realsignatureunknown;restoredfrom__doc__
"""
S.startswith(prefix[,start[,end]])->bool
ReturnTrueifSstartswiththespecifiedprefix,Falseotherwise.
Withoptionalstart,testSbeginningatthatposition.
Withoptionalend,stopcomparingSatthatposition.
prefixcanalsobeatupleofstringstotry.
（返回True,如果年代始于指定的前缀,否则假。
可选的开始,测试年代开始在那个位置。
带有可选结束,停止比较年代在那个位置。
前缀也可以尝试一个元组的字符串。）
"""
returnFalse
defstrip(self,chars=None):#realsignatureunknown;restoredfrom__doc__
"""
S.strip([chars])->str
ReturnacopyofthestringSwithleadingandtrailing
whitespaceremoved.
IfcharsisgivenandnotNone,removecharactersincharsinstead.（返回字符串的副本与前导和尾随空格移除。如果字符而不是没有,删除字符字符代替。）
"""
return""
defswapcase(self):#realsignatureunknown;restoredfrom__doc__
"""
S.swapcase()->str
ReturnacopyofSwithuppercasecharactersconvertedtolowercase
andviceversa.（返回一个副本的年代大写字符转换为小写反之亦然）
"""
return""
deftitle(self):#realsignatureunknown;restoredfrom__doc__
"""
S.title()->str
ReturnatitlecasedversionofS,i.e.wordsstartwithtitlecase
characters,allremainingcasedcharactershavelowercase.（返回一个titlecased版本的年代,即单词从标题开始字符,所有剩余的下套管字符小写）
"""
return""
deftranslate(self,table):#realsignatureunknown;restoredfrom__doc__
"""
S.translate(table)->str
ReturnacopyofthestringSinwhicheachcharacterhasbeenmapped
throughthegiventranslationtable.Thetablemustimplement
lookup/indexingvia__getitem__,forinstanceadictionaryorlist,
mappingUnicodeordinalstoUnicodeordinals,strings,orNone.If
thisoperationraisesLookupError,thecharacterisleftuntouched.
CharactersmappedtoNonearedeleted.（返回的字符串的每个字符被映射通过给定的转换表。
表必须实现通过__getitem__查找/索引,例如字典或列表,Unicode依次映射到Unicode序数、字符串或没有。
如果此操作提出了LookupError,字符保持不变）
"""
return""
defupper(self):#realsignatureunknown;restoredfrom__doc__
"""
S.upper()->str
ReturnacopyofSconvertedtouppercase.（返回一个副本年代转换为大写）
"""
return""
defzfill(self,width):#realsignatureunknown;restoredfrom__doc__
"""
S.zfill(width)->str
PadanumericstringSwithzerosontheleft,tofillafield
ofthespecifiedwidth.ThestringSisnevertruncated.（垫一个数字字符串与0年代在左边,填补一个字段指定的宽度。字符串年代不会截断。）
"""
return""
def__add__(self,*args,**kwargs):#realsignatureunknown
"""Returnself+value."""
pass
def__contains__(self,*args,**kwargs):#realsignatureunknown
"""Returnkeyinself."""
pass
def__eq__(self,*args,**kwargs):#realsignatureunknown
"""Returnself==value."""
pass
def__format__(self,format_spec):#realsignatureunknown;restoredfrom__doc__
"""
S.__format__(format_spec)->str
ReturnaformattedversionofSasdescribedbyformat_spec.
"""
return""
def__getattribute__(self,*args,**kwargs):#realsignatureunknown
"""Returngetattr(self,name)."""
pass
def__getitem__(self,*args,**kwargs):#realsignatureunknown
"""Returnself[key]."""
pass
def__getnewargs__(self,*args,**kwargs):#realsignatureunknown
pass
def__ge__(self,*args,**kwargs):#realsignatureunknown
"""Returnself>=value."""
pass
def__gt__(self,*args,**kwargs):#realsignatureunknown
"""Returnself>value."""
pass
def__hash__(self,*args,**kwargs):#realsignatureunknown
"""Returnhash(self)."""
pass
def__init__(self,value='',encoding=None,errors='strict'):#knownspecialcaseofstr.__init__
"""
str(object='')->str
str(bytes_or_buffer[,encoding[,errors]])->str
Createanewstringobjectfromthegivenobject.Ifencodingor
errorsisspecified,thentheobjectmustexposeadatabuffer
thatwillbedecodedusingthegivenencodinganderrorhandler.
Otherwise,returnstheresultofobject.__str__()(ifdefined)
orrepr(object).
encodingdefaultstosys.getdefaultencoding().
errorsdefaultsto'strict'.
#(copiedfromclassdoc)
"""
pass
def__iter__(self,*args,**kwargs):#realsignatureunknown
"""Implementiter(self)."""
pass
def__len__(self,*args,**kwargs):#realsignatureunknown
"""Returnlen(self)."""
pass
def__le__(self,*args,**kwargs):#realsignatureunknown
"""Returnself<=value."""
pass
def__lt__(self,*args,**kwargs):#realsignatureunknown
"""Returnself<value."""
pass
def__mod__(self,*args,**kwargs):#realsignatureunknown
"""Returnself%value."""
pass
def__mul__(self,*args,**kwargs):#realsignatureunknown
"""Returnself*value.n"""
pass
@staticmethod#knowncaseof__new__
def__new__(*args,**kwargs):#realsignatureunknown
"""Createandreturnanewobject.Seehelp(type)foraccuratesignature."""
pass
def__ne__(self,*args,**kwargs):#realsignatureunknown
"""Returnself!=value."""
pass
def__repr__(self,*args,**kwargs):#realsignatureunknown
"""Returnrepr(self)."""
pass
def__rmod__(self,*args,**kwargs):#realsignatureunknown
"""Returnvalue%self."""
pass
def__rmul__(self,*args,**kwargs):#realsignatureunknown
"""Returnself*value."""
pass
def__sizeof__(self):#realsignatureunknown;restoredfrom__doc__
"""S.__sizeof__()->sizeofSinmemory,inbytes"""
pass
def__str__(self,*args,**kwargs):#realsignatureunknown
"""Returnstr(self)."""
pass
classsuper(object):
"""
super()->sameassuper(__class__,<firstargument>)
super(type)->unboundsuperobject
super(type,obj)->boundsuperobject;requiresisinstance(obj,type)
super(type,type2)->boundsuperobject;requiresissubclass(type2,type)
Typicalusetocallacooperativesuperclassmethod:
classC(B):
defmeth(self,arg):
super().meth(arg)
Thisworksforclassmethodstoo:
classC(B):
@classmethod
defcmeth(cls,arg):
super().cmeth(arg)
"""
def__getattribute__(self,*args,**kwargs):#realsignatureunknown
"""Returngetattr(self,name)."""
pass
def__get__(self,*args,**kwargs):#realsignatureunknown
"""Returnanattributeofinstance,whichisoftypeowner."""
pass
def__init__(self,type1=None,type2=None):#knownspecialcaseofsuper.__init__
"""
super()->sameassuper(__class__,<firstargument>)
super(type)->unboundsuperobject
super(type,obj)->boundsuperobject;requiresisinstance(obj,type)
super(type,type2)->boundsuperobject;requiresissubclass(type2,type)
Typicalusetocallacooperativesuperclassmethod:
classC(B):
defmeth(self,arg):
super().meth(arg)
Thisworksforclassmethodstoo:
classC(B):
@classmethod
defcmeth(cls,arg):
super().cmeth(arg)
#(copiedfromclassdoc)
"""
pass
@staticmethod#knowncaseof__new__
def__new__(*args,**kwargs):#realsignatureunknown
"""Createandreturnanewobject.Seehelp(type)foraccuratesignature."""
pass
def__repr__(self,*args,**kwargs):#realsignatureunknown
"""Returnrepr(self)."""
pass
__self_class__=property(lambdaself:type(object))
"""thetypeoftheinstanceinvokingsuper();maybeNone
:type:type
"""
__self__=property(lambdaself:type(object))
"""theinstanceinvokingsuper();maybeNone
:type:type
"""
__thisclass__=property(lambdaself:type(object))
"""theclassinvokingsuper()
:type:type
"""
classSyntaxWarning(Warning):
"""Baseclassforwarningsaboutdubioussyntax."""
def__init__(self,*args,**kwargs):#realsignatureunknown
pass
@staticmethod#knowncaseof__new__
def__new__(*args,**kwargs):#realsignatureunknown
"""Createandreturnanewobject.Seehelp(type)foraccuratesignature."""
pass
classSystemError(Exception):
"""
InternalerrorinthePythoninterpreter.
PleasereportthistothePythonmaintainer,alongwiththetraceback,
thePythonversion,andthehardware/OSplatformandversion.
"""
def__init__(self,*args,**kwargs):#realsignatureunknown
pass
@staticmethod#knowncaseof__new__
def__new__(*args,**kwargs):#realsignatureunknown
"""Createandreturnanewobject.Seehelp(type)foraccuratesignature."""
pass
classSystemExit(BaseException):
"""Requesttoexitfromtheinterpreter."""
def__init__(self,*args,**kwargs):#realsignatureunknown
pass
code=property(lambdaself:object(),lambdaself,v:None,lambdaself:None)#default
"""exceptioncode"""
classTabError(IndentationError):
"""Impropermixtureofspacesandtabs."""
def__init__(self,*args,**kwargs):#realsignatureunknown
pass
classTimeoutError(OSError):
"""Timeoutexpired."""
def__init__(self,*args,**kwargs):#realsignatureunknown
pass
classtuple(object):
"""
tuple()->emptytuple
tuple(iterable)->tupleinitializedfromiterable'sitems
Iftheargumentisatuple,thereturnvalueisthesameobject.
"""
defcount(self,value):#realsignatureunknown;restoredfrom__doc__
"""T.count(value)->integer--returnnumberofoccurrencesofvalue"""
return0
defindex(self,value,start=None,stop=None):#realsignatureunknown;restoredfrom__doc__
"""
T.index(value,[start,[stop]])->integer--returnfirstindexofvalue.
RaisesValueErrorifthevalueisnotpresent.
"""
return0
def__add__(self,*args,**kwargs):#realsignatureunknown
"""Returnself+value."""
pass
def__contains__(self,*args,**kwargs):#realsignatureunknown
"""Returnkeyinself."""
pass
def__eq__(self,*args,**kwargs):#realsignatureunknown
"""Returnself==value."""
pass
def__getattribute__(self,*args,**kwargs):#realsignatureunknown
"""Returngetattr(self,name)."""
pass
def__getitem__(self,*args,**kwargs):#realsignatureunknown
"""Returnself[key]."""
pass
def__getnewargs__(self,*args,**kwargs):#realsignatureunknown
pass
def__ge__(self,*args,**kwargs):#realsignatureunknown
"""Returnself>=value."""
pass
def__gt__(self,*args,**kwargs):#realsignatureunknown
"""Returnself>value."""
pass
def__hash__(self,*args,**kwargs):#realsignatureunknown
"""Returnhash(self)."""
pass
def__init__(self,seq=()):#knownspecialcaseoftuple.__init__
"""
tuple()->emptytuple
tuple(iterable)->tupleinitializedfromiterable'sitems
Iftheargumentisatuple,thereturnvalueisthesameobject.
#(copiedfromclassdoc)
"""
pass
def__iter__(self,*args,**kwargs):#realsignatureunknown
"""Implementiter(self)."""
pass
def__len__(self,*args,**kwargs):#realsignatureunknown
"""Returnlen(self)."""
pass
def__le__(self,*args,**kwargs):#realsignatureunknown
"""Returnself<=value."""
pass
def__lt__(self,*args,**kwargs):#realsignatureunknown
"""Returnself<value."""
pass
def__mul__(self,*args,**kwargs):#realsignatureunknown
"""Returnself*value.n"""
pass
@staticmethod#knowncaseof__new__
def__new__(*args,**kwargs):#realsignatureunknown
"""Createandreturnanewobject.Seehelp(type)foraccuratesignature."""
pass
def__ne__(self,*args,**kwargs):#realsignatureunknown
"""Returnself!=value."""
pass
def__repr__(self,*args,**kwargs):#realsignatureunknown
"""Returnrepr(self)."""
pass
def__rmul__(self,*args,**kwargs):#realsignatureunknown
"""Returnself*value."""
pass
classtype(object):
"""
type(object_or_name,bases,dict)
type(object)->theobject'stype
type(name,bases,dict)->anewtype
"""
defmro(self):#realsignatureunknown;restoredfrom__doc__
"""
mro()->list
returnatype'smethodresolutionorder
"""
return[]
def__call__(self,*args,**kwargs):#realsignatureunknown
"""Callselfasafunction."""
pass
def__delattr__(self,*args,**kwargs):#realsignatureunknown
"""Implementdelattr(self,name)."""
pass
def__dir__(self):#realsignatureunknown;restoredfrom__doc__
"""
__dir__()->list
specialized__dir__implementationfortypes
"""
return[]
def__getattribute__(self,*args,**kwargs):#realsignatureunknown
"""Returngetattr(self,name)."""
pass
def__init__(cls,what,bases=None,dict=None):#knownspecialcaseoftype.__init__
"""
type(object_or_name,bases,dict)
type(object)->theobject'stype
type(name,bases,dict)->anewtype
#(copiedfromclassdoc)
"""
pass
def__instancecheck__(self):#realsignatureunknown;restoredfrom__doc__
"""
__instancecheck__()->bool
checkifanobjectisaninstance
"""
returnFalse
@staticmethod#knowncaseof__new__
def__new__(*args,**kwargs):#realsignatureunknown
"""Createandreturnanewobject.Seehelp(type)foraccuratesignature."""
pass
def__prepare__(self):#realsignatureunknown;restoredfrom__doc__
"""
__prepare__()->dict
usedtocreatethenamespacefortheclassstatement
"""
return{}
def__repr__(self,*args,**kwargs):#realsignatureunknown
"""Returnrepr(self)."""
pass
def__setattr__(self,*args,**kwargs):#realsignatureunknown
"""Implementsetattr(self,name,value)."""
pass
def__sizeof__(self):#realsignatureunknown;restoredfrom__doc__
"""
__sizeof__()->int
returnmemoryconsumptionofthetypeobject
"""
return0
def__subclasscheck__(self):#realsignatureunknown;restoredfrom__doc__
"""
__subclasscheck__()->bool
checkifaclassisasubclass
"""
returnFalse
def__subclasses__(self):#realsignatureunknown;restoredfrom__doc__
"""__subclasses__()->listofimmediatesubclasses"""
return[]
__abstractmethods__=property(lambdaself:object(),lambdaself,v:None,lambdaself:None)#default
__bases__=(
object,
)
__base__=object
__basicsize__=864
__dictoffset__=264
__dict__=None#(!)realvalueis''
__flags__=-2146675712
__itemsize__=40
__mro__=(
None,#(!)forward:type,realvalueis''
object,
)
__name__='type'
__qualname__='type'
__text_signature__=None
__weakrefoffset__=368
classTypeError(Exception):
"""Inappropriateargumenttype."""
def__init__(self,*args,**kwargs):#realsignatureunknown
pass
@staticmethod#knowncaseof__new__
def__new__(*args,**kwargs):#realsignatureunknown
"""Createandreturnanewobject.Seehelp(type)foraccuratesignature."""
pass
classUnboundLocalError(NameError):
"""Localnamereferencedbutnotboundtoavalue."""
def__init__(self,*args,**kwargs):#realsignatureunknown
pass
@staticmethod#knowncaseof__new__
def__new__(*args,**kwargs):#realsignatureunknown
"""Createandreturnanewobject.Seehelp(type)foraccuratesignature."""
pass
classValueError(Exception):
"""Inappropriateargumentvalue(ofcorrecttype)."""
def__init__(self,*args,**kwargs):#realsignatureunknown
pass
@staticmethod#knowncaseof__new__
def__new__(*args,**kwargs):#realsignatureunknown
"""Createandreturnanewobject.Seehelp(type)foraccuratesignature."""
pass
classUnicodeError(ValueError):
"""Unicoderelatederror."""
def__init__(self,*args,**kwargs):#realsignatureunknown
pass
@staticmethod#knowncaseof__new__
def__new__(*args,**kwargs):#realsignatureunknown
"""Createandreturnanewobject.Seehelp(type)foraccuratesignature."""
pass
classUnicodeDecodeError(UnicodeError):
"""Unicodedecodingerror."""
def__init__(self,*args,**kwargs):#realsignatureunknown
pass
@staticmethod#knowncaseof__new__
def__new__(*args,**kwargs):#realsignatureunknown
"""Createandreturnanewobject.Seehelp(type)foraccuratesignature."""
pass
def__str__(self,*args,**kwargs):#realsignatureunknown
"""Returnstr(self)."""
pass
encoding=property(lambdaself:object(),lambdaself,v:None,lambdaself:None)#default
"""exceptionencoding"""
end=property(lambdaself:object(),lambdaself,v:None,lambdaself:None)#default
"""exceptionend"""
object=property(lambdaself:object(),lambdaself,v:None,lambdaself:None)#default
"""exceptionobject"""
reason=property(lambdaself:object(),lambdaself,v:None,lambdaself:None)#default
"""exceptionreason"""
start=property(lambdaself:object(),lambdaself,v:None,lambdaself:None)#default
"""exceptionstart"""
classUnicodeEncodeError(UnicodeError):
"""Unicodeencodingerror."""
def__init__(self,*args,**kwargs):#realsignatureunknown
pass
@staticmethod#knowncaseof__new__
def__new__(*args,**kwargs):#realsignatureunknown
"""Createandreturnanewobject.Seehelp(type)foraccuratesignature."""
pass
def__str__(self,*args,**kwargs):#realsignatureunknown
"""Returnstr(self)."""
pass
encoding=property(lambdaself:object(),lambdaself,v:None,lambdaself:None)#default
"""exceptionencoding"""
end=property(lambdaself:object(),lambdaself,v:None,lambdaself:None)#default
"""exceptionend"""
object=property(lambdaself:object(),lambdaself,v:None,lambdaself:None)#default
"""exceptionobject"""
reason=property(lambdaself:object(),lambdaself,v:None,lambdaself:None)#default
"""exceptionreason"""
start=property(lambdaself:object(),lambdaself,v:None,lambdaself:None)#default
"""exceptionstart"""
classUnicodeTranslateError(UnicodeError):
"""Unicodetranslationerror."""
def__init__(self,*args,**kwargs):#realsignatureunknown
pass
@staticmethod#knowncaseof__new__
def__new__(*args,**kwargs):#realsignatureunknown
"""Createandreturnanewobject.Seehelp(type)foraccuratesignature."""
pass
def__str__(self,*args,**kwargs):#realsignatureunknown
"""Returnstr(self)."""
pass
encoding=property(lambdaself:object(),lambdaself,v:None,lambdaself:None)#default
"""exceptionencoding"""
end=property(lambdaself:object(),lambdaself,v:None,lambdaself:None)#default
"""exceptionend"""
object=property(lambdaself:object(),lambdaself,v:None,lambdaself:None)#default
"""exceptionobject"""
reason=property(lambdaself:object(),lambdaself,v:None,lambdaself:None)#default
"""exceptionreason"""
start=property(lambdaself:object(),lambdaself,v:None,lambdaself:None)#default
"""exceptionstart"""
classUnicodeWarning(Warning):
"""
BaseclassforwarningsaboutUnicoderelatedproblems,mostly
relatedtoconversionproblems.
"""
def__init__(self,*args,**kwargs):#realsignatureunknown
pass
@staticmethod#knowncaseof__new__
def__new__(*args,**kwargs):#realsignatureunknown
"""Createandreturnanewobject.Seehelp(type)foraccuratesignature."""
pass
classUserWarning(Warning):
"""Baseclassforwarningsgeneratedbyusercode."""
def__init__(self,*args,**kwargs):#realsignatureunknown
pass
@staticmethod#knowncaseof__new__
def__new__(*args,**kwargs):#realsignatureunknown
"""Createandreturnanewobject.Seehelp(type)foraccuratesignature."""
pass
classZeroDivisionError(ArithmeticError):
"""Secondargumenttoadivisionormodulooperationwaszero."""
def__init__(self,*args,**kwargs):#realsignatureunknown
pass
@staticmethod#knowncaseof__new__
def__new__(*args,**kwargs):#realsignatureunknown
"""Createandreturnanewobject.Seehelp(type)foraccuratesignature."""
pass
classzip(object):
"""
zip(iter1[,iter2[...]])-->zipobject
Returnazipobjectwhose.__next__()methodreturnsatuplewhere
thei-thelementcomesfromthei-thiterableargument.The.__next__()
methodcontinuesuntiltheshortestiterableintheargumentsequence
isexhaustedandthenitraisesStopIteration.
"""
def__getattribute__(self,*args,**kwargs):#realsignatureunknown
"""Returngetattr(self,name)."""
pass
def__init__(self,iter1,iter2=None,*some):#realsignatureunknown;restoredfrom__doc__
pass
def__iter__(self,*args,**kwargs):#realsignatureunknown
"""Implementiter(self)."""
pass
@staticmethod#knowncaseof__new__
def__new__(*args,**kwargs):#realsignatureunknown
"""Createandreturnanewobject.Seehelp(type)foraccuratesignature."""
pass
def__next__(self,*args,**kwargs):#realsignatureunknown
"""Implementnext(self)."""
pass
def__reduce__(self,*args,**kwargs):#realsignatureunknown
"""Returnstateinformationforpickling."""
pass
class__loader__(object):
"""
Metapathimportforbuilt-inmodules.
Allmethodsareeitherclassorstaticmethodstoavoidtheneedto
instantiatetheclass.
"""
defcreate_module(self,*args,**kwargs):#realsignatureunknown
"""Createabuilt-inmodule"""
pass
defexec_module(self,*args,**kwargs):#realsignatureunknown
"""Execabuilt-inmodule"""
pass
deffind_module(self,*args,**kwargs):#realsignatureunknown
"""
Findthebuilt-inmodule.
If'path'iseverspecifiedthenthesearchisconsideredafailure.
Thismethodisdeprecated.Usefind_spec()instead.
"""
pass
deffind_spec(self,*args,**kwargs):#realsignatureunknown
pass
defget_code(self,*args,**kwargs):#realsignatureunknown
"""ReturnNoneasbuilt-inmodulesdonothavecodeobjects."""
pass
defget_source(self,*args,**kwargs):#realsignatureunknown
"""ReturnNoneasbuilt-inmodulesdonothavesourcecode."""
pass
defis_package(self,*args,**kwargs):#realsignatureunknown
"""ReturnFalseasbuilt-inmodulesareneverpackages."""
pass
defload_module(self,*args,**kwargs):#realsignatureunknown
"""
Loadthespecifiedmoduleintosys.modulesandreturnit.
Thismethodisdeprecated.Useloader.exec_moduleinstead.
"""
pass
defmodule_repr(module):#reliablyrestoredbyinspect
"""
Returnreprforthemodule.
Themethodisdeprecated.Theimportmachinerydoesthejobitself.
"""
pass
def__init__(self,*args,**kwargs):#realsignatureunknown
pass
__weakref__=property(lambdaself:object(),lambdaself,v:None,lambdaself:None)#default
"""listofweakreferencestotheobject(ifdefined)"""
__dict__=None#(!)realvalueis''
#variableswithcomplexvalues
Ellipsis=None#(!)realvalueis''
NotImplemented=None#(!)realvalueis''
__spec__=None#(!)realvalueis''
三.所有字符串数据类型举例
#变量名字变大写
tmp="zhangyanlin"
tmp_new=tmp.upper()
print(tmp_new)
#输出所有字符定义的所有类型
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']
#把首字母变成大写
u1="zhang"
u2=u1.capitalize()
print(u2)
#20定义20个位，不够用_补全。
u1="zhang"
u2=u1.center(20,'_')
print(u2)
#看zh在前10位出现了几次
u1="zhangyanliniszhgod"
u2=u1.count('zh',0,10)
print(u2)
#获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))
#将tab转换成空格
u1="zhang\t123"
print(u1.expandtabs(20))
#找位数,相同只能找第一个出现的，没有想应得会反馈-1
u1="zhanghello"
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="zhangisyan"
#判断是否是字母
print(u1.isalpha())
#判断是否是数字
print(u1.isdigit())
#判断是否是字母和数字
print(u1.isalnum())
#判断是否是小写
print(u1.islower())
#判断是否是空格
print(u1.isspace())
#判断是不是标题
print(u1.istitle())
#判断是不是全部都是大写
print(u1.isupper())
#把列表里的内容连接一起
print("_".join(u1))
#内容左对齐，右侧填充
print(u1.ljust(1))
#内容变小写
print(u1.lower())
#移除左边的空格
print(u1.lstrip())
#移除右边的空格
print(u1.rstrip())
#把有空格的内容分割,变成元祖类型，从左找；rpartition从右开始分割
print(u1.partition('is'))
#替换,后面可以加替换几个，从左往右
print(u1.replace('zh','ZH'))
#找到一个字符分割,从右，split从左分割
print(u1.rsplit('a',1))
#是否以某个字符串开始开始
print(u1.startswith('z'))
#移除两边空格（strip）
print(u1.strip())
#大写变小写，小写变大写
print(u1.swapcase())
#变大写（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，知道第三个数 u1="zhangyanlin" print(u1[0:4])
六.循环切片
1.while使用
u1="zhangyanlin" u2=0 whileu2<len(u1): print(u1[u2]) u2+=1
2.for使用
#循环切片 u1="zhangyanlin" foru2inu1: print(u2) #循环切片，输出除了y u1="zhangyanlin" foru2inu1: ifu2=="y": continue print(u2) #循环切片，输出到y后不执行 u1="zhangyanlin" foru2inu1: ifu2=="y": break print(u2)