#strip
name='*agon**'
print(name.strip('*'))
print(name.lstrip('*'))
print(name.rstrip('*'))
#startswith endswith
print(name.endswith('SB'))
print(name.startswith('alex'))
#replace
name='ale namx say:I have one tesla,my name is alex'
print(name.replace('alex','SB',l))
#format的三种玩法
res='{} {} {} '.format('egon',18,'male')
res='{1}{0}{1}'.format('egon',18,'male')
res='{name}{age}{sex}'.format{sex='male',name='egon',age=18}
#find,rfind,index,rindex,count
name='egon say hello'
print(name,find('o',1,3)) #顾头不顾尾，找不到则返回，-1不会报错，找到了则显示索引
print（name.index('e',2,4)）#同上，但是到不到会报错
print(name.count('e',1,3)) #顾头不顾尾，如果不指定范围则查到所有
#split
name='root:x:0:0::/root:/bin/bash'
pirnt(name.split(':')) #默认分隔符为空格
name='C:/a/b/c/d.txt' #只想拿到顶级目录
print(name.rsplit('/',l))
name='a/b/c'
print(name.rsplit('l',l)) #从右开始切分
#join
tag=' '
print(tag.join(['egon','say','hello','world'])) #可迭代对象必须都是字符串
#center，ljust，rjust，zfill
name='egon'
print(name.center(30,'-'))
print(name.ljust(30,'*')
print(name.rjust(30,'*'))
print(name.zfill(50)) #用0填充
#expandtabs
name='egon+hello'
print(name)
print(name.expandtabs(l)) #lower upper
name='egon'
print(name.upper())
prnit(namae.lower())
#captalize,swapcass,title
print(name.captalize()) #首字母大写
print(name.swapcass()) #大小写翻转
mas='egon say hi'
print(mas.title()) #每个单词的首字母的大写
#is数字系列 #在py3中
num1=b'4' #bytes
num2=u'4' #unicode py3中无需加u
num3='四' #中文数字
num4='IV' #罗马数字 #isdigt:bytes,unicode
print(num1.isdigit()) #True
print(num2.isdigit()) #True
print(num3.isdigit()) #False
print(num4.isdigit()) #False
#isdecimal:uncicode
#bytes类型无isdecimal方法
print(num2.isdecimal())#True .
print(num3.isdecimal())#False
print(num4.isdecimal())#False
#isnumberic:unicode,中文数字 罗马数字
#bytes 类型无isnumberic方法
print(num2.isnumberic())#True
print(num3.isnumberic())#True
print(num4.isnumberic())#True
#3三者不能判断浮点数
num5='4.3'
print(num5.isdigit)
print(num5.isdecimal)
print(num5.isnumberic)
#is其他 print('====>')
name='egon 123'
print(name.isalnum()) #字符串由字母和数字组成
print(name.isalpha()) #字符串只由字母组成
print(name.isidentitler())
print(name.islower())
print(name.isupper())
print(name.isspace())
print(name.istitle())
-