[python]FileNotFoundError...System cannot find the path specified

[creichle]

I am new to programming and am trying to run some code. I am getting the following error:

FileNotFoundError:  [WinError3] The system cannot find the path specified: 'data'

There is a 'data' file that came with the code(code is from Github) as I am viewing it in PyCharm IDE.

I type

 import os os.listdir

and i get a list of files...'data' is not listed though. How do I add a path to the file directory so that the 'data' file gets specified? There are two excel csv.spreadsheets in the 'data' file. The program is suppose to write a new excel spreadsheet for the recent day and make calculations. I am stuck. Please help.

FYI...i have added a path to the variable environment under advanced system settings but the path is still not recognized.

Thank you for your attention in this matter.