String Common methods Python

1 bit_length () the minimum number of digits to use when the decimal is in binary notation2# v = -3# data =v.bit_length ()4 # Print (data)5# s ='Abcdefjh'6# S1 = s[0:3]7 # Print (S1)8# s2 = s[5:0:-1]9 # Print (S2)Ten# s3 = s[-1::-2] One # Print (S3) A# a ='everything I never told you' -# a1 =a.capitalize () #首字母大写 - # Print (A1) the# a2 =a.swapcase () #大小写转换 - # Print (A2) -# a3 =a.title () #每个单词首字母大写 - # Print (A3) +# a4 = A.center ( -,"*") #内容居中, (total length, blank padding) - # print (A4) +# A5 = a.count ('e',0, -) #字符串中元素出现的个数. can be sliced A # Print (A5) at#s ='Talk was cheap make the move' -# s2 ="sad\t" -# s3 =S2.expandtabs () - # Print (S3) - #\t in front of the full-complement - # By default, a tab key becomes 8 spaces, if the character in front of the tab is less than 8, then complete 8, if the character in front of the TAB key is more than 8 less than 16, then complete 16, and so on each complement of 8.  in# s ='Talk was cheap make the move' -# S1 = S.startswith ("Tal") #判断是否以 ... Start to # Print (S1) #返回的是布尔值 +# s2 = S.endswith ("Move") #判断是否以 ... End - # Print (S2) the# s3 = S.startswith ("e", One, -) #可切片, Gu Tou disregard butt * # Print (S3) $#s ='Talk was cheap make the move'Panax Notoginseng# S4 = S.find ("cheap",8, the) #寻找字符串中的元素是否存在 -# print (S4) #若存在返回索引值, if there is no return-1 the# S5 = S.index (" Make") #寻找字符串中的元素是否存在 + # Print (S5) #若存在返回索引值, error if not present A# s6 ='Life was short I love python'. Split () the # Print (S6) #以什么分割最终形成一个不含该分割元素的列表, the default element is a space +# s7 ='Life was short I love python'. Split ('I') - # Print (S7) $ # $ #format的三种用法, formatted output -# msg ='my name is {}, this year {}, gender {}'. Format ('Eason', -,'male') - # Print (msg) the# msg ='my name is {}, this year {}, gender {}'. Format ('Eason', -,'male') - # Print (msg)Wuyi# msg ='my name {name}, this year {age}, gender {sex}'. Format (sex='male', name='Eason', age= -) the # Print (msg) - #strip Wu# NAME ='*ea*son**' -# Print (Name.strip ('*') ) #去掉首尾的符号 By default is a space About# Print (Name.lstrip ('*') ) #去掉左 (first) side of the symbol $# Print (Name.rstrip ('*') ) #去掉右 (tail) side of the symbol string in the middle of not falling - #replace -# s ='think of your night, black what can not see, you know not' -# Print (S.replace ('You're','Pig',2) ) #替换 (old, new, left-to-right replacement number) A # # #is系列 +Name ='mark123' the # Print (Name.isalnum ()) #判断字符串由字母或数字组成 - # Print (Name.isalpha ()) #判断字符串只由字母组成 $#print (Name.isdigit ()) #判断字符串只由数字组成 The return value is a Boolean type

String Common methods Python