python – Get the last 4 characters of a string

I have the following string: "aaaabbbb"

How can I get the last four characters and store them in a string using Python?

Like this:

>>>mystr = "abcdefghijkl"
>>>mystr[-4:]
'ijkl'

This slices the string’s last 4 characters. The -4 starts the range from the string’s end. A modified expression with [:-4] removes the same 4 characters from the end of the string:

>>>mystr[:-4]
'abcdefgh'

For more information on slicing see this Stack Overflow answer.

str = "aaaaabbbb"
newstr = str[-4:]

See : http://codepad.org/S3zjnKoD