python的数据类型都有哪些_Python数据类型

1 classstr(basestring):2 """

3 str(object='') -> string4

5 Return a nice string representation of the object.6 If the argument is a string, the return value is the same object.7 """

8 defcapitalize(self):9 """首字母变大写"""

10 """

11 S.capitalize() -> string12

13 Return a copy of the string S with only its first character14 capitalized.15 """

16 return ""

17

18 def center(self, width, fillchar=None):19 """内容居中，width：总长度；fillchar：空白处填充内容，默认无"""

20 """

21 S.center(width[, fillchar]) -> string22

23 Return S centered in a string of length width. Padding is24 done using the specified fill character (default is a space)25 """

26 return ""

27

28 def count(self, sub, start=None, end=None):29 """子序列个数"""

30 """

31 S.count(sub[, start[, end]]) -> int32

33 Return the number of non-overlapping occurrences of substring sub in34 string S[start:end]. Optional arguments start and end are interpreted35 as in slice notation.36 """

37 return038

39 def decode(self, encoding=None, errors=None):40 """解码"""

41 """

42 S.decode([encoding[,errors]]) -> object43

44 Decodes S using the codec registered for encoding. encoding defaults45 to the default encoding. errors may be given to set a different error46 handling scheme. Default is 'strict' meaning that encoding errors raise47 a UnicodeDecodeError. Other possible values are 'ignore' and 'replace'48 as well as any other name registered with codecs.register_error that is49 able to handle UnicodeDecodeErrors.50 """

51 returnobject()52

53 def encode(self, encoding=None, errors=None):54 """编码，针对unicode"""

55 """

56 S.encode([encoding[,errors]]) -> object57

58 Encodes S using the codec registered for encoding. encoding defaults59 to the default encoding. errors may be given to set a different error60 handling scheme. Default is 'strict' meaning that encoding errors raise61 a UnicodeEncodeError. Other possible values are 'ignore', 'replace' and62 'xmlcharrefreplace' as well as any other name registered with63 codecs.register_error that is able to handle UnicodeEncodeErrors.64 """

65 returnobject()66

67 def endswith(self, suffix, start=None, end=None):68 """是否以 xxx 结束"""

69 """

70 S.endswith(suffix[, start[, end]]) -> bool71

72 Return True if S ends with the specified suffix, False otherwise.73 With optional start, test S beginning at that position.74 With optional end, stop comparing S at that position.75 suffix can also be a tuple of strings to try.76 """

77 returnFalse78

79 def expandtabs(self, tabsize=None):80 """将tab转换成空格，默认一个tab转换成8个空格"""

81 """

82 S.expandtabs([tabsize]) -> string83

84 Return a copy of S where all tab characters are expanded using spaces.85 If tabsize is not given, a tab size of 8 characters is assumed.86 """

87 return ""

88

89 def find(self, sub, start=None, end=None):90 """寻找子序列位置，如果没找到，返回 -1"""

91 """

92 S.find(sub [,start [,end]]) -> int93

94 Return the lowest index in S where substring sub is found,95 such that sub is contained within S[start:end]. Optional96 arguments start and end are interpreted as in slice notation.97

98 Return -1 on failure.99 """

100 return0101

102 def format(*args, **kwargs): #known special case of str.format

103 """字符串格式化，动态参数，将函数式编程时细说"""

104 """

105 S.format(*args, **kwargs) -> string106

107 Return a formatted version of S, using substitutions from args and kwargs.108 The substitutions are identified by braces ('{' and '}').109 """

110 pass

111

112 def index(self, sub, start=None, end=None):113 """子序列位置，如果没找到，报错"""

114 S.index(sub [,start [,end]]) ->int115

116 Like S.find() but raise ValueError when the substring is notfound.117 """

118 return 0119

120 def isalnum(self):121 """ 是否是字母和数字 """

122 """

123 S.isalnum() ->bool124

125 Return True if all characters inS are alphanumeric126 and there is at least one character inS, False otherwise.127 """

128 return False129

130 def isalpha(self):131 """ 是否是字母 """

132 """

133 S.isalpha() ->bool134

135 Return True if all characters inS are alphabetic136 and there is at least one character inS, False otherwise.137 """

138 return False139

140 def isdigit(self):141 """ 是否是数字 """

142 """

143 S.isdigit() ->bool144

145 Return True if all characters inS are digits146 and there is at least one character inS, False otherwise.147 """

148 return False149

150 def islower(self):151 """ 是否小写 """

152 """

153 S.islower() ->bool154

155 Return True if all cased characters in S are lowercase and there is

156 at least one cased character inS, False otherwise.157 """

158 return False159

160 def isspace(self):161 """

162 S.isspace() ->bool163

164 Return True if all characters inS are whitespace165 and there is at least one character inS, False otherwise.166 """

167 return False168

169 def istitle(self):170 """

171 S.istitle() ->bool172

173 Return True if S is a titlecased string and there isat least one174 character inS, i.e. uppercase characters may only follow uncased175 characters andlowercase characters only cased ones. Return False176 otherwise.177 """

178 return False179

180 def isupper(self):181 """

182 S.isupper() ->bool183

184 Return True if all cased characters in S are uppercase and there is

185 at least one cased character inS, False otherwise.186 """

187 return False188

189 def join(self, iterable):190 """ 连接 """

191 """

192 S.join(iterable) ->string193

194 Return a string which is the concatenation of the strings inthe195 iterable. The separator between elements isS.196 """

197 return ""198

199 def ljust(self, width, fillchar=None):200 """ 内容左对齐，右侧填充 """

201 """

202 S.ljust(width[, fillchar]) ->string203

204 Return S left-justified in a string of length width. Padding is

205 done using the specified fill character (default isa space).206 """

207 return ""208

209 def lower(self):210 """ 变小写 """

211 """

212 S.lower() ->string213

214 Return a copy of the string S converted to lowercase.215 """

216 return ""217

218 def lstrip(self, chars=None):219 """ 移除左侧空白 """

220 """

221 S.lstrip([chars]) -> string orunicode222

223 Return a copy of the string S with leading whitespace removed.224 If chars is given and not None, remove characters inchars instead.225 If chars isunicode, S will be converted to unicode before stripping226 """

227 return ""228

229 def partition(self, sep):230 """ 分割，前，中，后三部分 """

231 """

232 S.partition(sep) ->(head, sep, tail)233

234 Search for the separator sep in S, and returnthe part before it,235 the separator itself, and the part after it. If the separator is not

236 found, return S andtwo empty strings.237 """

238 pass239

240 def replace(self, old, new, count=None):241 """ 替换 """

242 """

243 S.replace(old, new[, count]) ->string244

245 Return a copy of string S with all occurrences of substring246 old replaced by new. If the optional argument count is

247 given, only the first count occurrences are replaced.248 """

249 return ""250

251 def rfind(self, sub, start=None, end=None):252 """

253 S.rfind(sub [,start [,end]]) ->int254

255 Return the highest index in S where substring sub isfound,256 such that sub iscontained within S[start:end]. Optional257 arguments start and end are interpreted as inslice notation.258

259 Return -1on failure.260 """

261 return 0262

263 def rindex(self, sub, start=None, end=None):264 """

265 S.rindex(sub [,start [,end]]) ->int266

267 Like S.rfind() but raise ValueError when the substring is notfound.268 """

269 return 0270

271 def rjust(self, width, fillchar=None):272 """

273 S.rjust(width[, fillchar]) ->string274

275 Return S right-justified in a string of length width. Padding is

276 done using the specified fill character (default isa space)277 """

278 return ""279

280 def rpartition(self, sep):281 """

282 S.rpartition(sep) ->(head, sep, tail)283

284 Search for the separator sep in S, starting at the end of S, and return

285 the part before it, the separator itself, andthe part after it. If the286 separator is not found, return two empty strings andS.287 """

288 pass289

290 def rsplit(self, sep=None, maxsplit=None):291 """

292 S.rsplit([sep [,maxsplit]]) ->list of strings293

294 Return a list of the words inthe string S, using sep as the295 delimiter string, starting at the end of the string andworking296 to the front. If maxsplit isgiven, at most maxsplit splits are297 done. If sep is not specified or isNone, any whitespace string298 isa separator.299 """

300 return []301

302 def rstrip(self, chars=None):303 """

304 S.rstrip([chars]) -> string orunicode305

306 Return a copy of the string S with trailing whitespace removed.307 If chars is given and not None, remove characters inchars instead.308 If chars isunicode, S will be converted to unicode before stripping309 """

310 return ""311

312 def split(self, sep=None, maxsplit=None):313 """ 分割， maxsplit最多分割几次 """

314 """

315 S.split([sep [,maxsplit]]) ->list of strings316

317 Return a list of the words inthe string S, using sep as the318 delimiter string. If maxsplit isgiven, at most maxsplit319 splits are done. If sep is not specified or isNone, any320 whitespace string is a separator andempty strings are removed321 fromthe result.322 """

323 return []324

325 def splitlines(self, keepends=False):326 """ 根据换行分割 """

327 """

328 S.splitlines(keepends=False) ->list of strings329

330 Return a list of the lines inS, breaking at line boundaries.331 Line breaks are not included inthe resulting list unless keepends332 is given andtrue.333 """

334 return []335

336 def startswith(self, prefix, start=None, end=None):337 """ 是否起始 """

338 """

339 S.startswith(prefix[, start[, end]]) ->bool340

341 Return True ifS starts with the specified prefix, False otherwise.342 With optional start, test S beginning at that position.343 With optional end, stop comparing S at that position.344 prefix can also be a tuple of strings to try.345 """

346 return False347

348 def strip(self, chars=None):349 """ 移除两段空白 """

350 """

351 S.strip([chars]) -> string orunicode352

353 Return a copy of the string S with leading andtrailing354 whitespace removed.355 If chars is given and not None, remove characters inchars instead.356 If chars isunicode, S will be converted to unicode before stripping357 """

358 return ""359

360 def swapcase(self):361 """ 大写变小写，小写变大写 """

362 """

363 S.swapcase() ->string364

365 Return a copy of the string S with uppercase characters366 converted to lowercase andvice versa.367 """

368 return ""369

370 def title(self):371 """

372 S.title() ->string373

374 Return a titlecased version of S, i.e. words start with uppercase375 characters, all remaining cased characters have lowercase.376 """

377 return ""378

379 def translate(self, table, deletechars=None):380 """

381 转换，需要先做一个对应表，最后一个表示删除字符集合382 intab = "aeiou"

383 outtab = "12345"

384 trantab =maketrans(intab, outtab)385 str = "this is string example....wow!!!"

386 print str.translate(trantab, 'xm')387 """

388

389 """

390 S.translate(table [,deletechars]) ->string391

392 Return a copy of the string S, where all characters occurring393 in the optional argument deletechars are removed, andthe394 remaining characters have been mapped through the given395 translation table, which must be a string of length 256 orNone.396 If the table argument is None, no translation is applied and

397 the operation simply removes the characters indeletechars.398 """

399 return ""400

401 def upper(self):402 """

403 S.upper() ->string404

405 Return a copy of the string S converted to uppercase.406 """

407 return ""408

409 def zfill(self, width):410 """方法返回指定长度的字符串，原字符串右对齐，前面填充0。"""

411 """

412 S.zfill(width) ->string413

414 Pad a numeric string S with zeros on the left, to fill a field415 of the specified width. The string S isnever truncated.416 """

417 return ""418

419 def _formatter_field_name_split(self, *args, **kwargs): # real signature unknown420 pass421

422 def _formatter_parser(self, *args, **kwargs): # real signature unknown423 pass424

425 def __add__(self, y):426 """ x.__add__(y) <==> x+y """

427 pass428

429 def __contains__(self, y):430 """ x.__contains__(y) <==> y in x """

431 pass432

433 def __eq__(self, y):434 """ x.__eq__(y) <==> x==y """

435 pass436

437 def __format__(self, format_spec):438 """

439 S.__format__(format_spec) ->string440

441 Return a formatted version of S as described by format_spec.442 """

443 return ""444

445 def __getattribute__(self, name):446 """ x.__getattribute__('name') <==> x.name """

447 pass448

449 def __getitem__(self, y):450 """ x.__getitem__(y) <==> x[y] """

451 pass452

453 def __getnewargs__(self, *args, **kwargs): # real signature unknown454 pass455

456 def __getslice__(self, i, j):457 """

458 x.__getslice__(i, j) <==>x[i:j]459

460 Use of negative indices is notsupported.461 """

462 pass463

464 def __ge__(self, y):465 """ x.__ge__(y) <==> x>=y """

466 pass467

468 def __gt__(self, y):469 """ x.__gt__(y) <==> x>y """

470 pass471

472 def __hash__(self):473 """ x.__hash__() <==> hash(x) """

474 pass475

476 def __init__(self, string=''): # known special case of str.__init__477 """

478 str(object='') ->string479

480 Return a nice string representation of the object.481 If the argument is a string, the return value isthe same object.482 #(copied from class doc)

483 """

484 pass485

486 def __len__(self):487 """ x.__len__() <==> len(x) """

488 pass489

490 def __le__(self, y):491 """ x.__le__(y) <==> x<=y """

492 pass493

494 def __lt__(self, y):495 """ x.__lt__(y) <==> x

496 pass497

498 def __mod__(self, y):499 """ x.__mod__(y) <==> x%y """

500 pass501

502 def __mul__(self, n):503 """ x.__mul__(n) <==> x*n """

504 pass505

506 @staticmethod # known case of __new__507 def __new__(S, *more):508 """ T.__new__(S, ...) -> a new object with type S, a subtype of T """

509 pass510

511 def __ne__(self, y):512 """ x.__ne__(y) <==> x!=y """

513 pass514

515 def __repr__(self):516 """ x.__repr__() <==> repr(x) """

517 pass518

519 def __rmod__(self, y):520 """ x.__rmod__(y) <==> y%x """

521 pass522

523 def __rmul__(self, n):524 """ x.__rmul__(n) <==> n*x """

525 pass526

527 def __sizeof__(self):528 """ S.__sizeof__() -> size of S in memory, in bytes """

529 pass530

531 def __str__(self):532 """ x.__str__() <==> str(x) """

533 pass