python 移除字符串尾部的数字方法

import string

t.rstrip(string.digits)

> import string
> string.digits
'0123456789'
> string.hexdigits
'0123456789abcdefABCDEF'
> string.octdigits
'01234567'
> string.letters
'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
> string.lowercase
'abcdefghijklmnopqrstuvwxyz'
> string.uppercase
'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
> string.printable
'0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!"#$%&\'()*+,-./:;<=>"#$%&\'()*+,-./:;<=>"htmlcode">

> string.atof("1.23")
1.23
> string.atof("1")
1.0


转换的时候还可以制定进制的转化




> string.atoi("20")
20
> string.atoi("20",base=10)
20
> string.atoi("20",base=16)
32
> string.atoi("20",base=8)
16
> string.atoi("20",base=2)
Traceback (most recent call last):
 File "", line 1, in <module>
 File "/usr/lib64/python2.6/string.py", line 403, in atoi
  return _int(s, base)
ValueError: invalid literal for int() with base 2: '20'
> string.atoi("101",base=2)
5
> string.atoi("101",base=6)
37



capwords（s, sep = None）以sep作为分隔符，分割字符串是s，然后将每个字符串的首字母大写


> string.capwords("this is a dog")
'This Is A Dog'
> string.capwords("this is a dog",sep=" ")
'This Is A Dog'
> string.capwords("this is a dog",sep="s")
'This is a dog'
> string.capwords("this is a dog",sep="o")
'This is a doG'
>


maketrans（s, r）创建一个s到r的转换列表，然后可以使用translate（）方法来实现


> replist=string.maketrans("123","abc")
> replist1=string.maketrans("456","xyz")
> s="123456789"
> s.translate(replist)
'abc456789'
> s.translate(replist1)
'123xyz789'


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