# value = "raitOrEi" # v = value.capitalize()#首字母大写 # print(v) # v1 = v.casefold()#全部变小写，不只是英文的，其他语言特殊的大小写也变换 # print(v1) # v2 = v.lower()#只是英文变小写 # print(v2) # 设置宽度，并将内容居中 # 20 代指总长度 # 只能填充一个字符,字符可有可无，没有字符用空格填充 # value = "raitorei" # v = value.center(20) # print(v) # v1 = value.center(20,"*") # print(v1) # v2 = value.ljust(20,"*") # print(v2) # v3 = value.rjust(20,"*") # print(v3) # v4 = value.zfill(20)#只能用0填充 # print(v4) # 去字符串中寻找，寻找子序列的出现次数 # value = "reraitorei" # v1 = value.count('re') # v2 = value.count('re',5) # v3 = value.count('re',5,6)#起止位置 # print(v1) # print(v2) # print(v3) # encode # decode # 以什么开始 # 以什么结尾 # test = "raitorei" # v = test.startswith('r') # print(v) # v = test.endswith('i') # print(v) #把字符串中的 tab 符号('\t')转为空格，tab 符号('\t')默认的空格数是 8. #具体规则是，括号里是多少，以这个数字为一组，如果是开头，空格占位数字多少。比如 # test = "123\t456789" # v = test.expandtabs()#123 456789 8个一组，空格补缺少的位置 # print(v) # v1 = test.expandtabs(6)#123 456789 6个一组，空格补缺少的位置 # print(v1) # 从开始往后找，找到第一个之后，获取位置 # 大于等于开始，小于结束，未找到 -1 # test = "rei" # v = test.find('r',0,2 ) # print(v) # index找不到，报错 忽略 # test = "rei" # v = test.index('a') # print(v) # 将一个字符串中的占位符替换为指定的值 # test = "I'm {name}, age {a}" # print(test) # v = test.format(name='raitorei',a=22) # print(v) #将一个字符串中的占位符替换为指定的值,字典 # test = "I'm {name}, age {a}" # print(test) # v = test.format_map({"name": 'raitorei', "a": 22}) # print(v) # 星号 字符串中是否只包含字母，数字，汉字 # test = "fdfd1f风动旛动3" # v = test.isalnum() # print(v) # 星号 判断字符串中是否只包含字母，数字，汉字 # test = "fdfdf风动旛动" # v = test.isalpha() # print(v) # 判断字符串中是否是数字 # test = "123②" # v = test.isdecimal()#②，特殊的不可以 # v1 = test.isdigit()#二，中文的数字不支持 # v2 = test.isnumeric() # print(v,v1,v2) # 数字 字母 下划线 标识符：def class # test = "a123" # v = test.isidentifier()#数字开头false # print(v) # 数字 字母 下划线 标识符：def class # test = "a123" # v = test.isidentifier()#数字开头false # print(v) # 是否存在不能打印的字符，比如\t,结果是false # test = "a\t123" # v = test.isprintable() # print(v) # 判断是否全部是空格 # test = " \t" # v = test.isspace() # print(v) # 判断是否是标题 # test = "the loneliest girl" # v = test.istitle() # print(v) # v1 = test.title() # print(v1) # v2 = v1.istitle() # print(v2) # ***** 加入字符 # test = "_" # value = "raitorei" # v = test.join(value)#等于"".join(value) # print(v) # islower() 方法检测字符串是否由小写字母组成。 # isupper() 方法检测字符串中所有的字母是否都为大写。 # test1 = "abc" # test2 = "abc123" # test3 = "abc123A" # v1 = test1.islower() # v2 = test2.islower() # v3 = test3.islower() # print(v1,v2,v3) # test4 = "ABC" # test5 = "ABC123" # test6 = "ABC123a" # v4 = test4.isupper() # v5 = test5.isupper() # v6 = test6.isupper() # print(v4,v5,v6) # 变换大小写 # test = "asdfgh" # v = test.upper() # print(v) # v = v.lower() # print(v) # 默认去除左右空格,\t,\n；可以指定字符 # test = " a s fgh " # v = test.lstrip() # print(v) # v = test.rstrip() # print(v) # v = test.strip() # print(v) # v1 = v.strip("h") # print(v1) # 变换大小写 # test = "asdfgh" # v = test.maketrans("asd","123") # print(v) # v1 = test.translate(v) # print(v1) # 分割字符，partition包含分隔符，split不包含分隔符 # test = "asdfghasdfghasdfgh" # v1 = test.partition("f") # print(v1) # v2 = test.rpartition("f") # print(v2) # v3 = test.split("f",2) # print(v3) # v4 = test.rsplit("f",2) # print(v4) # 分割换行符，默认不包含分隔符(false)，true包含分隔符 # test = "asdfg\nhasd\nfghasdfgh" # v1 = test.splitlines(True) # print(v1) # 分割换行符，默认不包含分隔符(false)，true包含分隔符 # test = "asdfg\nhasd\nfghasdfgh" # v1 = test.splitlines(True) # print(v1) # 大小写转换 # test = "asdfghJKL" # v1 = test.swapcase() # print(v1) #替换 test = "asdfghaJKaL" # v1 = test.replace("a","b") # print(v1) # v2 = test.replace("a","b",2) # print(v2) ################基本(7个)################ # join # split # find # strip # upper # lower # replace ################灰魔法(5个)################ test = "raitorei" # #索引 # v1 = test[0] # print(v1) # #切片 # v2 = test[0:-1] # print(v2) # #长度 # v3 = len(test) # print(v3) # li = [1,2,3,4,5,"123"] # print(len(li)) #循环输出 # index = 0 # while index < len(test) : # print(test[index]) # index += 1 # print("---end---") # for demo in test: # print(a) #帮助创建数字,可以设置隔多少再创建 # v = range(0,100,5) # print(v) # for vv in v: # print(vv) #将输入的文字的索引输出 value = input(">>>") length = len(value) num = range(0,length) for f in num: print(f,value[f]) # *****注意： # 字符串一且自,不可修改。 # 一且修改或者拼接,部会造成重新生成字符串
