Question

i am struggling with regex in Python, i would like to find the position of the last token in a String.

Example:
“mydrive/projects/test/version01”

Now i would like to get the position of the symbol between “test” and “version01”

import re
txt = "mydrive/projects/test/version01"
p = re.compile("/^.*/(.*)$/")
m = re.search(p, txt)
m.group(0) 
#but m.group(0) delivers None

but with this i am getting “None” i tried several things, but couldn’t get it find the pattern. By the way i got this regex from a javascript page, but i think the patterns are the same.

thank you very much!

Answer 1

You say: Now i would like to get the position of the symbol between “test” and “version01”.

I don’t see how the regex is going to help you much. You could try the following:

Reverse scan for the symbol, if you know what the symbol is (I am assuming you do, since it is in the regex too):

>>> txt = "mydrive/projects/test/version01"
>>> txt.rfind('/')
21

If you don’t know the separator:

>>> import os.path
>>> len(os.path.dirname(txt))
21