how to change my pythons path code example

Example 1: how to use path to change working directory in python

pip install path
from path import Path

# set working directory
Path("/toWhereYouWantItToBe").cd()

Example 2: edit path variable using python

app_path = os.path.join(root_path, 'other', 'dir', 'to', 'app')
os.environ["PATH"] += os.pathsep + app_path