Trimming a string

[Tim Williams]

>I have a string that is 7 characters and represents file mode in UNIX/LINUX
from rpm:

>0100755

>I don't care about the 0100 portion, I am only interested in the file
>permissions portion which is 755.  How can I get three characters from the
>string starting at the right?  ( -OR- strip 4 characters from the left? )



>>> str = "0100755"
>>> str1 = str[4:]
>>> print str1
755
>>> str2 = str[-3:]
>>> print str2
755
>>>