Dot notation string manipulation

Question

Is there a way to manipulate a string in Python using the following ways?

For any string that is stored in dot notation, for example:

s = \"classes.s         


        

Answer 1

If your goal is to get rid of a final component that's just a single digit, start and end with re.sub():

s = re.sub(r"\.\d$", "", s)

This will do the job, and leave other strings alone. No need to mess with anything else.

If you do want to know about the general case (separate out the last component, no matter what it is), then use rsplit to split your string once:

>>> "hel.lo.there".rsplit(".", 1)
['hel.lo', 'there']

If there's no dot in the string you'll just get one element in your array, the entire string.