一:基本介绍
int 1,2,3用于计算。
bool:True,False,用户判断。
str:存储少量数据,进行操作
'fjdsal' '二哥','`13243','fdshklj'
'战三,李四,王二麻子。。。。'
list:储存大量的数据。
[1,2,3,'泰哥','12353234',[1,2,3]]
元祖:只读。
(1,2,3,'第三方',)
dict:字典{'name':'云姐','age':16}
字典{'云姐':[],'二哥':[200,200,200,。。。。。。]}
集合:{1,2,34,'asdf'}
二:详细介绍
1、int,str,bool
1 i = 100 2 print(i.bit_length()) 3 ''' 4 bit_length 5 1 0000 0001 1 6 2 0000 0010 2 7 3 0000 0011 2 8 '''
#str ---> int
1 s = '123' 2 i = int(s)
#int ---> str
1 i = 1 2 s = str(i)
#bool----> int True 1 False 0
#str --->bool
s = "" -----> False
非空字符串都是True
s = "0" -----> True
2、字符串的索引与切片
1 s = 'ABCDLSESRF' 2 #索引 3 s1 = s[0] 4 print(s1) 5 s2 = s[2] 6 print(s2) 7 s3 = s[-1] 8 print(s3) 9 s4 = s[-2] 10 print(s4) 11 #ABCD 切片 :顾头不顾尾 12 s5 = s[0:4] 13 print(s5) 14 s6 = s[0:-1] 15 print(s6) 16 s7 = s[:] 17 s8 = s[0:] 18 print(s7,s8) 19 s9 = s[0:0] 20 #= 'ABCDLSESRF' # s[首:尾:步长] 21 s10 = s[0:5:2] 22 print(s10) 23 s11 = s[4:0:-1] 24 print(s11) 25 s12 = s[3::-1] 26 print(s12) 27 s13 = s[3::-2] 28 print(s13) 29 s = 'ABCDLSESRF' 30 s14 = s[-1::-1] 31 print(s14) 32 s15 = s[::-1] 33 print(s15)
#字符串的操作
1 s = 'alexWUsir' 2 s1 = s.capitalize() # 首字母大写
# 全大写,全小写
1 s2 = s.upper() 2 s21 = s.lower() 3 print(s2,s21) 4 5 s_str= 'acEQ1' 6 you_input =input('请输入验证码,不区分大小写') 7 if s_str.upper() == you_input.upper(): 8 print('输入成功') 9 else: 10 print('请重新输入')
#大小写翻转
1 s3 = s.swapcase() 2 print(s3)
# 每个隔开(特殊字符或者数字)的单词首字母大写
1 s = 'alex*egon-wusir' 2 s4 = s.title() 3 print(s4) 4 s = 'fade,crazy*w4rri0r_songsong node_3' 5 s4 = s.title() 6 print(s4)
#居中,空白填充
1 s = 'alexWUsir' 2 s5 = s.center(20,'~') 3 print(s5) 4 5 s = 'alex\tsir' 6 s6 = s.expandtabs() 7 print(s6) 8 9 s = 'alex二哥'
#公共方法
1 l = len(s) 2 print(l)
#以什么开头结尾 endswith
1 s = 'alexWUsir' 2 s7 =s.startswith('alex') 3 s71 = s.startswith('e',2,5) 4 print(s71)
# 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
1 s = 'alexWUsir' 2 s8 = s.find('A') 3 s81 = s.index('A') 4 print(s81,type(s8)) 5 6 strip rstrip lstrip 7 s = 'alexWUsir%' 8 s9 = s.strip('%') 9 print(s9) 10 s = ' *a%lexWUsi* r%' 11 s91 = s.strip(' %*') 12 print(s91)
# strip 默认删除前后空格
1 username = input('请输入名字:').strip() 2 if username =='春哥': 3 print('恭喜春哥发财') 4 5 s = 'alexaa wusirl' 6 s10 = s.count('al') 7 print(s10) 8 9 split str ---->list 10 s = ';alex;wusir;taibai' 11 l = s.split('a') 12 print(l)
#format的三种玩法 格式化输出
1 s = '我叫{},今年{},爱好{},再说一下我叫{}'.format('太白',36,'girl','太白') 2 print(s) 3 name = input('请输入名字:') 4 s = '我叫{0},今年{1},爱好{2},再说一下我叫{0}'.format(name,36,'girl') 5 print(s) 6 name = input('请输入名字:') 7 s = '我叫{name},今年{age},爱好{hobby},再说一下我叫{name}'.format(age=18,name=name,hobby='girl') 8 print(s)
#replace替换
1 s = '来看待街坊邻居复合大师街坊法好的撒见客户' 2 s11 = s.replace('街坊','老王',1) 3 print(s11)