標籤:python 字串操作
特性:不可修改
name.capitalize() 首字母大寫name.casefold() 大寫全部變小寫name.center(50,"-") 輸出 ‘---------------------Alex Li----------------------‘name.count(‘lex‘) 統計 lex出現次數name.encode() 將字串編碼成bytes格式name.endswith("Li") 判斷字串是否以 Li結尾 "Alex\tLi".expandtabs(10) 輸出‘Alex Li‘, 將\t轉換成多長的空格 name.find(‘A‘) 尋找A,找到返回其索引, 找不到返回-1 format : >>> msg = "my name is {}, and age is {}" >>> msg.format("alex",22) ‘my name is alex, and age is 22‘ >>> msg = "my name is {1}, and age is {0}" >>> msg.format("alex",22) ‘my name is 22, and age is alex‘ >>> msg = "my name is {name}, and age is {age}" >>> msg.format(age=22,name="ale") ‘my name is ale, and age is 22‘format_map >>> msg.format_map({‘name‘:‘alex‘,‘age‘:22}) ‘my name is alex, and age is 22‘msg.index(‘a‘) 返回a所在字串的索引‘9aA‘.isalnum() True‘9‘.isdigit() 是否整數name.isnumeric name.isprintablename.isspacename.istitlename.isupper "|".join([‘alex‘,‘jack‘,‘rain‘])‘alex|jack|rain‘maketrans >>> intab = "aeiou" #This is the string having actual characters. >>> outtab = "12345" #This is the string having corresponding mapping character >>> trantab = str.maketrans(intab, outtab) >>> >>> str = "this is string example....wow!!!" >>> str.translate(trantab) ‘th3s 3s str3ng 2x1mpl2....w4w!!!‘ msg.partition(‘is‘) 輸出 (‘my name ‘, ‘is‘, ‘ {name}, and age is {age}‘) >>> "alex li, chinese name is lijie".replace("li","LI",1) ‘alex LI, chinese name is lijie‘ msg.swapcase 大小寫互換 >>> msg.zfill(40)‘00000my name is {name}, and age is {age}‘>>> n4.ljust(40,"-")‘Hello 2orld-----------------------------‘>>> n4.rjust(40,"-")‘-----------------------------Hello 2orld‘>>> b="ddefdsdff_哈哈" >>> b.isidentifier() #檢測一段字串可否被當作標誌符,即是否符合變數命名規則True
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python 字串操作