6868# [[fill]align][sign][#][0][,][.precision][type] 用 : 代替 %
6969print ('-------------------------------------' )
7070print ('----{:*^20s}----' .format ('welcome' ))
71- print ('My name is {name:s}, I\' m {age:d} now and My Height is {height:,.2f}' .format (name = 'Jiaming' , age = 21 , height = 1111.987 ))
71+ print ('My name is {}, I\' m {} now and My Height is {}' .format ('Jiaming' , 21 , 1.987 ))
72+ print ('My name is {1}, I\' m {0} now and My Height is {2}' .format (21 , 'Jiaming' , 1.987 ))
73+ print ('My name is {name:s}, I\' m {age:d} now and My Height is {height:,.2f}' .
74+ format (name = 'Jiaming' , age = 21 , height = 1.908 ))
7275
76+ # 字符串常用操作
77+ # 检查子字符串 in/not in
78+ print ('-------------------------------------' )
79+ str1 = "Hello World Hahaha xx dd"
80+ print ('xx' in str1 )
81+ print ('xx' not in str1 )
82+
83+ # 拼接 +
84+ print ('Hello ' + 'World' )
85+
86+ # 复制 *
87+ print ('Hello' * 2 )
88+
89+ # 截取 str[i] 取某个字符 str[i:j] 取i到j（不包括j)的切片,i不写表示从0开始截取，j不写表截到结束
90+ print (str1 [1 ])
91+ print (str1 [:])
92+ # str[x:y:z] 从x开始截取，到y结束（不包括y），每隔z取一次字符
93+ print (str1 [1 :11 :3 ])
94+
95+ # 获取字符串长度、最大字符、最小字符
96+ print (len (str1 ))
97+ print (max (str1 ))
98+ print (min ('abcd' ))
99+
100+ # 查找&替换
101+ # str.count(substr,beginIndex,endIndex) 统计子字符串出现的次数
102+ print (str1 .count ('ha' ))
103+ print (str1 .count ('ha' , 0 , 16 ))
104+ # str.find(sub,begin,end) str.rfind(sub[,start[,end]]) 返回首次查到的index，无则返回-1
105+ # str.index(sub[,start[,end]]) str.rindex(sub[,start[,end]]) 不存在会报错
106+ print (str1 .find ('o' , 0 , len (str1 )))
107+ # str.replace(old, new[, count]) 用新字符串替换老字符串，可选替换次数，不改变原值
108+ print (str1 .replace ('llo' , 'EEE' ))
109+ # str.startswith(str[, start[, end]]) str.endswith(str[, start[, end]]) 以str开头/结尾
110+ # str.isalnum() str.isalpha() str.isdigit() str.islower() str.isupper() str.istitle()
111+ # str.lower() str.upper() str.swapcase()
112+ # str.capitalize() 首字母大写 str.title() 每个单词首字母大写
113+ # str.center(width[, fill]) str.ljust(width[, fill]) str.rjust(width[, fill]) 中/左/右对齐
114+ # str.strip([chars]) str.rstrip([chars]) str.lstrip([chars]) 从两端/右边/左边 去除以chars开头的字符串，默认空格
115+ print ('-------------------------------------' )
116+ print (str1 .strip ('Hell' ))
117+
118+ # 拆分组合 str.partition(sep) str.rpartition(sep) str.split(sep[, maxsplit]) str.rsplit(sep[, maxsplit])
119+ # str.join(iterator)
120+ print ('ABC123AA bb' .partition ('23' ))
121+ print ('ABC123AA bb' .split ('23' ))
122+ print ('ABC123AA bb' .join ('xyz' ))
0 commit comments