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Python基本数据类型
元组，列表，字典，集合
一：什么是数据类型
x = 10,10是我们要存储的数据
二：数据类型
数字（整型，长整型，浮点型，复数）
字符串
列表
元组
字典
集合
Bytes类型
（一）：数字（int,float,complex)
作用：年纪，等级，薪资，身份证号，qq号等数字相关
print(bin(10))#将10进制转换成二进制
print(oct(10))#将10进制转换成8进制
print(hex(10))#将10进制转换成16进制
#0b1010
#0o12
#0xa
（二）：字符串（str)
字符串的常用操作
移除空白
分割
长度
索引
切片
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. """ return "" def casefold(self): # real signature unknown; restored from __doc__ """ 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__ """ 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__ """ 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__ """ 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__ """ 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__ """ 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__ """ 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 """ 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__ """ 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__ """ S.index(sub[, start[, end]]) -> int Like S.find() but raise ValueError when the substring is not found. """ 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. """ 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. """ return False def isdecimal(self): # real signature unknown; restored from __doc__ """ 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__ """ 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__ """ 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__ """ 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__ """ 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__ """ 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__ """ 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__ """ 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__ """ 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__ """ 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__ """ 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__ """ 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__ """ 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 """ 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__ """ 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__ """ 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__ """ 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__ """ S.rindex(sub[, start[, end]]) -> int Like S.rfind() but raise ValueError when the substring is not found. """ 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). """ 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. """ 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. """ 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. """ 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. """ 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. """ 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. """ 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. """ 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. """ 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. """ 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. """ return "" def upper(self): # real signature unknown; restored from __doc__ """ S.upper() -> str Return a copy of S converted to uppercase. """ 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. """ 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=http://www.mamicode.com/‘‘, 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
#移除空白
name = ‘ egon‘
print(name.strip())##取出两边的空白
name = ‘*egon‘
print(name.strip(‘*‘))##移除制定的字符
#分割
info = ‘root:x:0:0::/root:/bin/bash‘
user_info.split(‘:‘)#以冒号作为切个字符
print(user_info.split(‘:‘))
cmd_info = ‘get|a.txt|33333‘
print(cmd_info.split(‘|‘))##以|为切分字符
print(cmd_info.split(‘|‘,1))##制定的最大切分次数为1
#长度
name = ‘egon‘
print(len(name))
#切片
name = ‘egon‘
print(name[1:3])
1 class str(object): 2 """ 3 str(object=‘‘) -> str 4 str(bytes_or_buffer[, encoding[, errors]]) -> str 5 6 Create a new string object from the given object. If encoding or 7 errors is specified, then the object must expose a data buffer 8 that will be decoded using the given encoding and error handler. 9 Otherwise, returns the result of object.__str__() (if defined) 10 or repr(object). 11 encoding defaults to sys.getdefaultencoding(). 12 errors defaults to ‘strict‘. 13 """ 14 def capitalize(self): # real signature unknown; restored from __doc__ 15 """ 16 S.capitalize() -> str 17 18 Return a capitalized version of S, i.e. make the first character 19 have upper case and the rest lower case. 20 """ 21 return "" 22 23 def casefold(self): # real signature unknown; restored from __doc__ 24 """ 25 S.casefold() -> str 26 27 Return a version of S suitable for caseless comparisons. 28 """ 29 return "" 30 31 def center(self, width, fillchar=None): # real signature unknown; restored from __doc__ 32 """ 33 S.center(width[, fillchar]) -> str 34 35 Return S centered in a string of length width. Padding is 36 done using the specified fill character (default is a space) 37 """ 38 return "" 39 40 def count(self, sub, start=None, end=None): # real signature unknown; restored from __doc__ 41 """ 42 S.count(sub[, start[, end]]) -> int 43 44 Return the number of non-overlapping occurrences of substring sub in 45 string S[start:end]. Optional arguments start and end are 46 interpreted as in slice notation. 47 """ 48 return 0 49 50 def encode(self, encoding=‘utf-8‘, errors=‘strict‘): # real signature unknown; restored from __doc__ 51 """ 52 S.encode(encoding=‘utf-8‘, errors=‘strict‘) -> bytes 53 54 Encode S using the codec registered for encoding. Default encoding 55 is ‘utf-8‘. errors may be given to set a different error 56 handling scheme. Default is ‘strict‘ meaning that encoding errors raise 57 a UnicodeEncodeError. Other possible values are ‘ignore‘, ‘replace‘ and 58 ‘xmlcharrefreplace‘ as well as any other name registered with 59 codecs.register_error that can handle UnicodeEncodeErrors. 60 """ 61 return b"" 62 63 def endswith(self, suffix, start=None, end=None): # real signature unknown; restored from __doc__ 64 """ 65 S.endswith(suffix[, start[, end]]) -> bool 66 67 Return True if S ends with the specified suffix, False otherwise. 68 With optional start, test S beginning at that position. 69 With optional end, stop comparing S at that position. 70 suffix can also be a tuple of strings to try. 71 """ 72 return False 73 74 def expandtabs(self, tabsize=8): # real signature unknown; restored from __doc__ 75 """ 76 S.expandtabs(tabsize=8) -> str 77 78 Return a copy of S where all tab characters are expanded using spaces. 79 If tabsize is not given, a tab size of 8 characters is assumed. 80 """ 81 return "" 82 83 def find(self, sub, start=None, end=None): # real signature unknown; restored from __doc__ 84 """ 85 S.find(sub[, start[, end]]) -> int 86 87 Return the lowest index in S where substring sub is found, 88 such that sub is contained within S[start:end]. Optional 89 arguments start and end are interpreted as in slice notation. 90 91 Return -1 on failure. 92 """ 93 return 0 94 95 def format(self, *args, **kwargs): # known special case of str.format 96 """ 97 S.format(*args, **kwargs) -> str 98 99 Return a formatted version of S, using substitutions from args and kwargs. 100 The substitutions are identified by braces (‘{‘ and ‘}‘). 101 """ 102 pass 103 104 def format_map(self, mapping): # real signature unknown; restored from __doc__ 105 """ 106 S.format_map(mapping) -> str 107 108 Return a formatted version of S, using substitutions from mapping. 109 The substitutions are identified by braces (‘{‘ and ‘}‘). 110 """ 111 return "" 112 113 def index(self, sub, start=None, end=None): # real signature unknown; restored from __doc__ 114 """ 115 S.index(sub[, start[, end]]) -> int 116 117 Like S.find() but raise ValueError when the substring is not found. 118 """ 119 return 0 120 121 def isalnum(self): # real signature unknown; restored from __doc__ 122 """ 123 S.isalnum() -> bool 124 125 Return True if all characters in S are alphanumeric 126 and there is at least one character in S, False otherwise. 127 """ 128 return False 129 130 def isalpha(self): # real signature unknown; restored from __doc__ 131 """ 132 S.isalpha() -> bool 133 134 Return True if all characters in S are alphabetic 135 and there is at least one character in S, False otherwise. 136 """ 137 return False 138 139 def isdecimal(self): # real signature unknown; restored from __doc__ 140 """ 141 S.isdecimal() -> bool 142 143 Return True if there are only decimal characters in S, 144 False otherwise. 145 """ 146 return False 147 148 def isdigit(self): # real signature unknown; restored from __doc__ 149 """ 150 S.isdigit() -> bool 151 152 Return True if all characters in S are digits 153 and there is at least one character in S, False otherwise. 154 """ 155 return False 156 157 def isidentifier(self): # real signature unknown; restored from __doc__ 158 """ 159 S.isidentifier() -> bool 160 161 Return True if S is a valid identifier according 162 to the language definition. 163 164 Use keyword.iskeyword() to test for reserved identifiers 165 such as "def" and "class". 166 """ 167 return False 168 169 def islower(self): # real signature unknown; restored from __doc__ 170 """ 171 S.islower() -> bool 172 173 Return True if all cased characters in S are lowercase and there is 174 at least one cased character in S, False otherwise. 175 """ 176 return False 177 178 def isnumeric(self): # real signature unknown; restored from __doc__ 179 """ 180 S.isnumeric() -> bool 181 182 Return True if there are only numeric characters in S, 183 False otherwise. 184 """ 185 return False 186 187 def isprintable(self): # real signature unknown; restored from __doc__ 188 """ 189 S.isprintable() -> bool 190 191 Return True if all characters in S are considered 192 printable in repr() or S is empty, False otherwise. 193 """ 194 return False 195 196 def isspace(self): # real signature unknown; restored from __doc__ 197 """ 198 S.isspace() -> bool 199 200 Return True if all characters in S are whitespace 201 and there is at least one character in S, False otherwise. 202 """ 203 return False 204 205 def istitle(self): # real signature unknown; restored from __doc__ 206 """ 207 S.istitle() -> bool 208 209 Return True if S is a titlecased string and there is at least one 210 character in S, i.e. upper- and titlecase characters may only 211 follow uncased characters and lowercase characters only cased ones. 212 Return False otherwise. 213 """ 214 return False 215 216 def isupper(self): # real signature unknown; restored from __doc__ 217 """ 218 S.isupper() -> bool 219 220 Return True if all cased characters in S are uppercase and there is 221 at least one cased character in S, False otherwise. 222 """ 223 return False 224 225 def join(self, iterable): # real signature unknown; restored from __doc__ 226 """ 227 S.join(iterable) -> str 228 229 Return a string which is the concatenation of the strings in the 230 iterable. The separator between elements is S. 231 """ 232 return "" 233 234 def ljust(self, width, fillchar=None): # real signature unknown; restored from __doc__ 235 """ 236 S.ljust(width[, fillchar]) -> str 237 238 Return S left-justified in a Unicode string of length width. Padding is 239 done using the specified fill character (default is a space). 240 """ 241 return "" 242 243 def lower(self): # real signature unknown; restored from __doc__ 244 """ 245 S.lower() -> str 246 247 Return a copy of the string S converted to lowercase. 248 """ 249 return "" 250 251 def lstrip(self, chars=None): # real signature unknown; restored from __doc__ 252 """ 253 S.lstrip([chars]) -> str 254 255 Return a copy of the string S with leading whitespace removed. 256 If chars is given and not None, remove characters in chars instead. 257 """ 258 return "" 259 260 def maketrans(self, *args, **kwargs): # real signature unknown 261 """ 262 Return a translation table usable for str.translate(). 263 264 If there is only one argument, it must be a dictionary mapping Unicode 265 ordinals (integers) or characters to Unicode ordinals, strings or None. 266 Character keys will be then converted to ordinals. 267 If there are two arguments, they must be strings of equal length, and 268 in the resulting dictionary, each character in x will be mapped to the 269 character at the same position in y. If there is a third argument, it 270 must be a string, whose characters will be mapped to None in the result. 271 """ 272 pass 273 274 def partition(self, sep): # real signature unknown; restored from __doc__ 275 """ 276 S.partition(sep) -> (head, sep, tail) 277 278 Search for the separator sep in S, and return the part before it, 279 the separator itself, and the part after it. If the separator is not 280 found, return S and two empty strings. 281 """ 282 pass 283 284 def replace(self, old, new, count=None): # real signature unknown; restored from __doc__ 285 """ 286 S.replace(old, new[, count]) -> str 287 288 Return a copy of S with all occurrences of substring 289 old replaced by new. If the optional argument count is 290 given, only the first count occurrences are replaced. 291 """ 292 return "" 293 294 def rfind(self, sub, start=None, end=None): # real signature unknown; restored from __doc__ 295 """ 296 S.rfind(sub[, start[, end]]) -> int 297 298 Return the highest index in S where substring sub is found, 299 such that sub is contained within S[start:end]. Optional 300 arguments start and end are interpreted as in slice notation. 301 302 Return -1 on failure. 303 """ 304 return 0 305 306 def rindex(self, sub, start=None, end=None): # real signature unknown; restored from __doc__ 307 """ 308 S.rindex(sub[, start[, end]]) -> int 309 310 Like S.rfind() but raise ValueError when the substring is not found. 311 """ 312 return 0 313 314 def rjust(self, width, fillchar=None): # real signature unknown; restored from __doc__ 315 """ 316 S.rjust(width[, fillchar]) -> str 317 318 Return S right-justified in a string of length width. Padding is 319 done using the specified fill character (default is a space). 320 """ 321 return "" 322 323 def rpartition(self, sep): # real signature unknown; restored from __doc__ 324 """ 325 S.rpartition(sep) -> (head, sep, tail) 326 327 Search for the separator sep in S, starting at the end of S, and return 328 the part before it, the separator itself, and the part after it. If the 329 separator is not found, return two empty strings and S. 330 """ 331 pass 332 333 def rsplit(self, sep=None, maxsplit=-1): # real signature unknown; restored from __doc__ 334 """ 335 S.rsplit(sep=None, maxsplit=-1) -> list of strings 336 337 Return a list of the words in S, using sep as the 338 delimiter string, starting at the end of the string and 339 working to the front. If maxsplit is given, at most maxsplit 340 splits are done. If sep is not specified, any whitespace string 341 is a separator. 342 """ 343 return [] 344 345 def rstrip(self, chars=None): # real signature unknown; restored from __doc__ 346 """ 347 S.rstrip([chars]) -> str 348 349 Return a copy of the string S with trailing whitespace removed. 350 If chars is given and not None, remove characters in chars instead. 351 """ 352 return "" 353 354 def split(self, sep=None, maxsplit=-1): # real signature unknown; restored from __doc__ 355 """ 356 S.split(sep=None, maxsplit=-1) -> list of strings 357 358 Return a list of the words in S, using sep as the 359 delimiter string. If maxsplit is given, at most maxsplit 360 splits are done. If sep is not specified or is None, any 361 whitespace string is a separator and empty strings are 362 removed from the result. 363 """ 364 return [] 365 366 def splitlines(self, keepends=None): # real signature unknown; restored from __doc__ 367 """ 368 S.splitlines([keepends]) -> list of strings 369 370 Return a list of the lines in S, breaking at line boundaries. 371 Line breaks are not included in the resulting list unless keepends 372 is given and true. 373 """ 374 return [] 375 376 def startswith(self, prefix, start=None, end=None): # real signature unknown; restored from __doc__ 377 """ 378 S.startswith(prefix[, start[, end]]) -> bool 379 380 Return True if S starts with the specified prefix, False otherwise. 381 With optional start, test S beginning at that position. 382 With optional end, stop comparing S at that position. 383 prefix can also be a tuple of strings to try. 384 """ 385 return False 386 387 def strip(self, chars=None): # real signature unknown; restored from __doc__ 388 """ 389 S.strip([chars]) -> str 390 391 Return a copy of the string S with leading and trailing 392 whitespace removed. 393 If chars is given and not None, remove characters in chars instead. 394 """ 395 return "" 396 397 def swapcase(self): # real signature unknown; restored from __doc__ 398 """ 399 S.swapcase() -> str 400 401 Return a copy of S with uppercase characters converted to lowercase 402 and vice versa. 403 """ 404 return "" 405 406 def title(self): # real signature unknown; restored from __doc__ 407 """ 408 S.title() -> str 409 410 Return a titlecased version of S, i.e. words start with title case 411 characters, all remaining cased characters have lower case. 412 """ 413 return "" 414 415 def translate(self, table): # real signature unknown; restored from __doc__ 416 """ 417 S.translate(table) -> str 418 419 Return a copy of the string S in which each character has been mapped 420 through the given translation table. The table must implement 421 lookup/indexing via __getitem__, for instance a dictionary or list, 422 mapping Unicode ordinals to Unicode ordinals, strings, or None. If 423 this operation raises LookupError, the character is left untouched. 424 Characters mapped to None are deleted. 425 """ 426 return "" 427 428 def upper(self): # real signature unknown; restored from __doc__ 429 """ 430 S.upper() -> str 431 432 Return a copy of S converted to uppercase. 433 """ 434 return "" 435 436 def zfill(self, width): # real signature unknown; restored from __doc__ 437 """ 438 S.zfill(width) -> str 439 440 Pad a numeric string S with zeros on the left, to fill a field 441 of the specified width. The string S is never truncated. 442 """ 443 return "" 444 445 def __add__(self, *args, **kwargs): # real signature unknown 446 """ Return self+value. """ 447 pass 448 449 def __contains__(self, *args, **kwargs): # real signature unknown 450 """ Return key in self. """ 451 pass 452 453 def __eq__(self, *args, **kwargs): # real signature unknown 454 """ Return self==value. """ 455 pass 456 457 def __format__(self, format_spec): # real signature unknown; restored from __doc__ 458 """ 459 S.__format__(format_spec) -> str 460 461 Return a formatted version of S as described by format_spec. 462 """ 463 return "" 464 465 def __getattribute__(self, *args, **kwargs): # real signature unknown 466 """ Return getattr(self, name). """ 467 pass 468 469 def __getitem__(self, *args, **kwargs): # real signature unknown 470 """ Return self[key]. """ 471 pass 472 473 def __getnewargs__(self, *args, **kwargs): # real signature unknown 474 pass 475 476 def __ge__(self, *args, **kwargs): # real signature unknown 477 """ Return self>=value. """ 478 pass 479 480 def __gt__(self, *args, **kwargs): # real signature unknown 481 """ Return self>value. """ 482 pass 483 484 def __hash__(self, *args, **kwargs): # real signature unknown 485 """ Return hash(self). """ 486 pass 487 488 def __init__(self, value=http://www.mamicode.com/‘‘, encoding=None, errors=‘strict‘): # known special case of str.__init__ 489 """ 490 str(object=‘‘) -> str 491 str(bytes_or_buffer[, encoding[, errors]]) -> str 492 493 Create a new string object from the given object. If encoding or 494 errors is specified, then the object must expose a data buffer 495 that will be decoded using the given encoding and error handler. 496 Otherwise, returns the result of object.__str__() (if defined) 497 or repr(object). 498 encoding defaults to sys.getdefaultencoding(). 499 errors defaults to ‘strict‘. 500 # (copied from class doc) 501 """ 502 pass 503 504 def __iter__(self, *args, **kwargs): # real signature unknown 505 """ Implement iter(self). """ 506 pass 507 508 def __len__(self, *args, **kwargs): # real signature unknown 509 """ Return len(self). """ 510 pass 511 512 def __le__(self, *args, **kwargs): # real signature unknown 513 """ Return self<=value. """ 514 pass 515 516 def __lt__(self, *args, **kwargs): # real signature unknown 517 """ Return self<value. """ 518 pass 519 520 def __mod__(self, *args, **kwargs): # real signature unknown 521 """ Return self%value. """ 522 pass 523 524 def __mul__(self, *args, **kwargs): # real signature unknown 525 """ Return self*value.n """ 526 pass 527 528 @staticmethod # known case of __new__ 529 def __new__(*args, **kwargs): # real signature unknown 530 """ Create and return a new object. See help(type) for accurate signature. """ 531 pass 532 533 def __ne__(self, *args, **kwargs): # real signature unknown 534 """ Return self!=value. """ 535 pass 536 537 def __repr__(self, *args, **kwargs): # real signature unknown 538 """ Return repr(self). """ 539 pass 540 541 def __rmod__(self, *args, **kwargs): # real signature unknown 542 """ Return value%self. """ 543 pass 544 545 def __rmul__(self, *args, **kwargs): # real signature unknown 546 """ Return self*value. """ 547 pass 548 549 def __sizeof__(self): # real signature unknown; restored from __doc__ 550 """ S.__sizeof__() -> size of S in memory, in bytes """ 551 pass 552 553 def __str__(self, *args, **kwargs): # real signature unknown 554 """ Return str(self). """ 555 pass 556 557 558 class super(object): 559 """ 560 super() -> same as super(__class__, <first argument>) 561 super(type) -> unbound super object 562 super(type, obj) -> bound super object; requires isinstance(obj, type) 563 super(type, type2) -> bound super object; requires issubclass(type2, type) 564 Typical use to call a cooperative superclass method: 565 class C(B): 566 def meth(self, arg): 567 super().meth(arg) 568 This works for class methods too: 569 class C(B): 570 @classmethod 571 def cmeth(cls, arg): 572 super().cmeth(arg) 573 """ 574 def __getattribute__(self, *args, **kwargs): # real signature unknown 575 """ Return getattr(self, name). """ 576 pass 577 578 def __get__(self, *args, **kwargs): # real signature unknown 579 """ Return an attribute of instance, which is of type owner. """ 580 pass 581 582 def __init__(self, type1=None, type2=None): # known special case of super.__init__ 583 """ 584 super() -> same as super(__class__, <first argument>) 585 super(type) -> unbound super object 586 super(type, obj) -> bound super object; requires isinstance(obj, type) 587 super(type, type2) -> bound super object; requires issubclass(type2, type) 588 Typical use to call a cooperative superclass method: 589 class C(B): 590 def meth(self, arg): 591 super().meth(arg) 592 This works for class methods too: 593 class C(B): 594 @classmethod 595 def cmeth(cls, arg): 596 super().cmeth(arg) 597 598 # (copied from class doc) 599 """ 600 pass 601 602 @staticmethod # known case of __new__ 603 def __new__(*args, **kwargs): # real signature unknown 604 """ Create and return a new object. See help(type) for accurate signature. """ 605 pass 606 607 def __repr__(self, *args, **kwargs): # real signature unknown 608 """ Return repr(self). """ 609 pass 610 611 __self_class__ = property(lambda self: type(object)) 612 """the type of the instance invoking super(); may be None 613 614 :type: type 615 """ 616 617 __self__ = property(lambda self: type(object)) 618 """the instance invoking super(); may be None 619 620 :type: type 621 """ 622 623 __thisclass__ = property(lambda self: type(object)) 624 """the class invoking super() 625 626 :type: type 627 """ 628 629 630 631 class SyntaxWarning(Warning): 632 """ Base class for warnings about dubious syntax. """ 633 def __init__(self, *args, **kwargs): # real signature unknown 634 pass 635 636 @staticmethod # known case of __new__ 637 def __new__(*args, **kwargs): # real signature unknown 638 """ Create and return a new object. See help(type) for accurate signature. """ 639 pass 640 641 642 class SystemError(Exception): 643 """ 644 Internal error in the Python interpreter. 645 646 Please report this to the Python maintainer, along with the traceback, 647 the Python version, and the hardware/OS platform and version. 648 """ 649 def __init__(self, *args, **kwargs): # real signature unknown 650 pass 651 652 @staticmethod # known case of __new__ 653 def __new__(*args, **kwargs): # real signature unknown 654 """ Create and return a new object. See help(type) for accurate signature. """ 655 pass 656 657 658 class SystemExit(BaseException): 659 """ Request to exit from the interpreter. """ 660 def __init__(self, *args, **kwargs): # real signature unknown 661 pass 662 663 code = property(lambda self: object(), lambda self, v: None, lambda self: None) # default 664 """exception code""" 665 666 667 668 class TabError(IndentationError): 669 """ Improper mixture of spaces and tabs. """ 670 def __init__(self, *args, **kwargs): # real signature unknown 671 pass 672 673 674 class TimeoutError(OSError): 675 """ Timeout expired. """ 676 def __init__(self, *args, **kwargs): # real signature unknown 677 pass
##startswith,endswith name = ‘alex_SB‘ print(name.startswith(‘a‘)) print(name.endswith(‘SB‘)) ##repalce name = ‘alex say: i have one tesla,my name is alex‘ print(name.replace(‘alex‘,‘SB‘)) print(name.replace(‘alex‘,‘SB‘,1))#指定替换几次 ##format(由字符串本身提供的) res = ‘{}{}{}‘.format(‘egon‘,18,‘male‘) res = ‘{1}{0}{1}‘.format(‘egon‘,18,‘male‘)##根据索引来格式化 res = ‘{name}{age}{sex}‘.format(sex=‘male‘,name = ‘egon‘,age = 18)##根据指定的名称来替换 ##判断是否是数字 num = ‘123‘ print(num.isdigit()) oldboy_age = 73 while True: age = input(‘>>: ‘).strip() if len(age) == 0:continue if age.isdigit(): age = int(age) print(age,int(age)) ##字符串其他需要了解的方法 name = ‘egon‘ print(name.find(‘o‘))##没有时，显示-1，不会报错 print(name.index(‘o‘))##没有时会报错 print(name.count(‘o‘))##计数 #join l = [‘egon‘,‘say‘,‘hello‘,‘world‘] print(‘:‘.join(l))#按照冒号作分隔符，列表内容必须是字符串，相同内容也可以 #center name = ‘egon‘ print(name.center(30,‘*‘))##填充字符，指定宽度为30 print(name.ljust(30,‘*‘))##左边对齐，右边填充字符 print(name.zfill(30))#右对齐，不够用零填充 #expandtabs通常制表符指定的宽度为4，可以改变制表符指定的宽度 name = ‘egon\thello‘ print(name.expandtabs(1)) ##判断字母数字 name = ‘egon123‘ print(name.isalnum())#字符串由字母和数字组成 print(name.isalpha())##判断字符串是否全部是由字母组成的 print(name.isdigit())#判断字符串是否全部由数字组成的
（三）列表
列表的常用操作
索引
切片
追加
删除
长度
循环
包含in
##pop()弹出操作 my_girl_friends = [‘wupeiqi‘,‘alex‘,‘yuanhao‘,4,10,30] my_girl_friends.pop()##默认弹出的是最后一个元素，但是可以指定弹出元素的位置，指定位置参数 my_girl_friends.remove(‘wupeiqi‘)##是按照值弹出的 ##成员运算 print(‘wupeiqi‘ in my_girl_friends) #追加运算 print(my_girl_friends.append(‘oldboy‘))#追加一个元素到最后一个位置 print(my_girl_friends.extend([‘oldboy1‘,‘oldboy2‘]))##可以追加列表 ##可以指定元素的起始序号 li= [11,22,33] for k,v in enumerate(li,1) print(k,v)
（四）元组
元组的常用操作
索引
切片
循环
长度
包含in
##元组 tu = (11,22,33,11) print(tu.count(11))##计数 print(tu.index(1))##索引
（五）字典
##字典 dic = {‘k1‘:‘v1‘,‘k2‘:‘v2‘} print(dic.clear())#清空 print(dic.copy())#浅拷贝 print(dic.get(‘k1‘))#根据key获取指定的value print(dic.pop(‘k1‘))#获取并删除对应的value print(dic.popitem())#随机删除一个键值对 dic.setdefault(‘k3‘,‘v3‘) print(dic)#增加，如果存在不做任何操作 dic.update({‘k3‘:‘v3‘,‘k1‘:‘v4‘})#批量增加或者修改 ##生成一个字典 dic = dic.fromkeys([‘k1‘,‘k2‘,‘k3‘],123) print(dic)
（六）集合
可认为是不可重复的列表，集合是可变类型
##集合 se1 = {‘alex‘,‘eric‘,‘tony‘} se2 = {‘alex‘,‘egon‘,‘dreamki‘} #交，并，补，差 print(se1 & se2)#交运算 print(se1 | se2)#并运算 print(se1 ^ se2)#补运算 print(se1 - se2)#差运算
Python基本数据类型
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