#字符串的索引与切片s = 'ABCDLSESRF'#索引s1 = s[0]print(s1)s2 = s[2]print(s2)s3 = s[-1]print(s3)s4 = s[-2]print(s4)# #ABCD 切片 ：顾头不顾尾s5 = s[0:4]print(s5)s6 = s[0:-1]print(s6)s7 = s[:]s8 = s[0:]print(s7,s8)s9 = s[0:0]s = 'ABCDLSESRF' # s[首:尾:步长]s10 = s[0:5:2]print(s10)s11 = s[4:0:-1]print(s11)s12 = s[3::-1]print(s12)s13 = s[3::-2]print(s13)s = 'ABCDLSESRF's14 = s[-1::-1]print(s14)s15 = s[::-1]print(s15)#字符串的操作s = 'alexWUsir's1 = s.capitalize() # 首字母大写# print(s1)# 全大写，全小写s2 = s.upper()s21 = s.lower()print(s2,s21)s_str= 'acEQ1'you_input =input('请输入验证码，不区分大小写')if s_str.upper() == you_input.upper(): print('输入成功')else: print('请重新输入')#大小写翻转s3 = s.swapcase()print(s3)# 每个隔开(特殊字符或者数字)的单词首字母大写s = 'alex*egon-wusir's4 = s.title()print(s4)s = 'fade,crazy*w4rri0r_songsong node_3's4 = s.title()print(s4)#居中，空白填充s = 'alexWUsir's5 = s.center(20,'~')print(s5)s = 'alex\tsir's6 = s.expandtabs()print(s6)s = 'alex二哥'#公共方法l = len(s)print(l)#以什么开头结尾 endswiths = 'alexWUsir's7 =s.startswith('alex')s71 = s.startswith('e',2,5)print(s71)if s7: passelif s.startswith('bl'): passprint(s7)# find 通过元素找索引，找不到返回-1## index通过元素找索引，找不到报错s = 'alexWUsir's8 = s.find('A')s81 = s.index('A')print(s81,type(s8))#strip rstrip lstrips = 'alexWUsir%'s9 = s.strip('%')print(s9)s = ' *a%lexWUsi* r%'s91 = s.strip(' %*')print(s91)# strip 默认删除前后空格username = input('请输入名字：').strip()if username =='春哥': print('恭喜春哥发财')s = 'alexaa wusirl's10 = s.count('al')print(s10)#split str ---->lists = ';alex;wusir;taibai'l = s.split('a')print(l)#format的三种玩法 格式化输出s = '我叫{}，今年{}，爱好{}，再说一下我叫{}'.format('太白',36,'girl','太白')print(s)name = input('请输入名字：')s = '我叫{0}，今年{1}，爱好{2}，再说一下我叫{0}'.format(name,36,'girl')print(s)name = input('请输入名字：')s = '我叫{name}，今年{age}，爱好{hobby}，再说一下我叫{name}'.format(age=18,name=name,hobby='girl')print(s)s = '来看待街坊邻居复合大师街坊法好的撒见客户's11 = s.replace('街坊','老王',1) #后面不加参数1就默认全部替换print(s11)s = 'fhdsklfds'for i in s: print(i)s = 'fdsa苍井空fdsalk'if '苍井空' in s: print('您的评论有敏感词...') ACFRABCDABCDLSESRABCDLSESRF ABCDLSESRFACLLDCBDCBADBFRSESLDCBAFRSESLDCBAALEXWUSIR alexwusir请输入验证码，不区分大小写
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