从字符串的开头删除n个字符

Question

我想从字符串中删除第一个字符.有这样的功能吗？

>>> a = "BarackObama"
>>> print myfunction(4,a)
ckObama
>>> b = "The world is mine"
>>> print myfunction(6,b)
rld is mine

Answer 1

是的,只需使用切片:

 >> a = "BarackObama"
 >> a[4:]
 'ckObama'

文档在http://docs.python.org/tutorial/introduction.html#strings

Answer 2

功能可以是:

def cutit(s,n):    
   return s[n:]

然后你这样称呼它:

name = "MyFullName"

print cutit(name, 2)   # prints "FullName"

Answer 3

使用切片.

>>> a = "BarackObama"
>>> a[4:]
'ckObama'
>>> b = "The world is mine"
>>> b[6:10]
'rld '
>>> b[:9]
'The world'
>>> b[:3]
'The'
>>>b[:-3]
'The world is m'

您可以在官方教程中阅读此内容和大多数其他语言功能:http://docs.python.org/tut/