name = 'His name is Louie'
print(name.captitalize()) #首字母大写
print(name.count("i")) #i的数量
print(name.ceter(50，“-”) # 打印50个-
print(name.endswith("ie") #判断string以什么结尾
print(name.expandtabs(tabsize=10) #配合string中加“”打印多少个空格 name = 'His name is Louie'
print(name.find(“n”)
print(name.format(name='Alex', year=23)) #name = “His name is {name} and i am{year} old”
print(‘ab23’.isalnum()) #包括数字和字母
isalpha() #纯英文字符
isdecimal() #十进制
isdigit() #整数判断
isidentifier() #判断合法的变量名或者标识符
islower() #小写
isspace()
print("My Name Is".istitle())#每个字符第一个是大写
isprintable() #不能打印的文件,tty file
isupper() #大写
print("Name", join("==")
print('+'.join(['1','2','3','4']))
ljust(50,'*') #长度50不够，*补上
rjust(50,'+')
lower()
upper()
print(' Alex'.lstrip()) #去左边的空格和回车
print(' Alex '.rstrip())
print(' Alex '.strip())
#数字对应传递maketrans的方法,密码传递作用
p = str.maketrans("abcdef","123456")
print("Today is Python day!".translate(p))
print("Today is Python day!".replace("i","I",1))
print("Today is Python day!".rfind('i') #最右边的值的index
print("Today is Python day!".split()) #字符串分隔
print("1+2+3+4".split(“+”))
splitlines()
startswith()
endswith()
swapcase()
print("Today is Python day!".zfill(50)) #十六进制的补位用法