Python: get path to file in sister directory?

Question

I have a file structure like this:

data
   mydata.xls
scripts
   myscript.py

From within myscript.py, how can I get the filepath of mydata.

Answer 1

import os
directory = os.path.dirname(os.getcwd())
final = os.path.join(directory, 'data', 'mydata.xls')

or simply

os.path.abspath('../data/mydata.xls')