Common operations for python-strings

1Name ="My name is Irving and I am years old!"2 3 #开头字母大写4 print (Name.capitalize ())5 6 #统计某字符个数7Print (Name.count ("I"))8 9#把字符串延长至50字节, and centered, insufficient "--"CompleteTenPrint (Name.center ( -,"-")) One  A#检查是否以 "LD"End -Print (Name.endswith ("LD")) -  the #修改tab为30字节 -Name ="my \tname is Irving and I am years old!" -Print (Name.expandtabs (tabsize= -)) -  + #查找name的位置 -Print (name.Find("name")) +Print (Name[name.Find("name"):]) A  at #format, Placeholder -Name ="My name is {name} and I am {age} years old!" -Print (Name.format (name='Irving', age= at)) -Print (Name.format_map ({"name":"Irving"," Age": at})) #format_map dictionary form -  - #判断字符串是否为整数类型 inPrint'ba123'. IsDigit ()) -  to #判断字符串是否为字母 +Print'ABa'. Isalpha ()) -  the #判断是否为十进制数字 *Print'1 A'. Isdecimal ()) $ Panax Notoginseng #判断是否为数字和字母组合 -Print"ads1". Isalnum ()) the  + #判断是否为一个合法的标识符 (variable name) APrint'a [email protected]'. Isidentifier ()) the  + #判断字符串是否为标题 -Print'Ti Io Ee'. Istitle ()) $  $ #判断是否可以打印 -Print'Asdw Iu'. Isprintable ()) -  the #判断字符串是否为大写 -Print'AAAA'. Isupper ())Wuyi  the#Jointo insert an element between the elements -Print'-'.Join(['1','2','3'])) Wu 1-2-3 -  About #从左边开始算, not enough for 50-length ' # ' $Print (Name.ljust ( -,'#')) -Print (Name.rjust ( -,'#')) -  - #把字符串全部换成小写 APrint'xasss'. Lower ()) +  the #把字符串全部换成大写 -Print'Asdw'. Upper ()) $  the#忽略左边的'/ N' thePrint'n\irving'. Lstrip ()) thePrint'irving\n'. Lstrip ()) the  - #忽略全部 \ n inPrint'\nirving\n'. Strip) the  the #翻译对应字符, the number is equal before and after Aboutp = Str.maketrans ("Irving","123456") thePrint"Irving". Translate (p)) the  the #定义步长替换 +Print'Hihihi'. replace ('H','h',2)) -  the location of #从左边开始寻找第一个 ' I 'BayiPrint'Hihihihihi'. RFind ('I')) the  the #指定分隔符 -Print'1+2+3+4'.Split('2')) -  the #用 ' \ n ' Split thePrint'1+2\n+3+4'. Splitliness ()) the  the #大小写互换 -Print'Irving'. Swapcase ()) the  the #字符串转换成标题 thePrint'im AA'. Title ())

Common operations for python-strings