For question 1 use os.getcwd() # get working dir and os.chdir(r'D:\Steam\steamapps\common') # set working dir
I recommend using sys.argv[0] for question 2 because sys.argv is immutable and therefore always returns the current file (module object path) and not affected by os.chdir(). Also you can do like this:
import os
this_py_file = os.path.realpath(__file__)
# vvv Below comes your code vvv #
but that snippet and sys.argv[0] will not work or will work wierd when compiled by PyInstaller because magic properties are not set in __main__ level and sys.argv[0] is the way your exe was called (means that it becomes affected by the working dir).
