How to move to one folder back in python

Question

Actually need to go some path and execute some command and below is the code

code:

import os
present_working_directory = \'/home/Desktop         


        

Answer 1

think about using absolute paths

import os
pwd = '/home/Desktop/folder'

if some_condition == true :
    path = os.path.join(pwd, "nodes/hellofolder")
    os.chdir(path)
    print os.getcwd()
if another_condition  == true:
    path = os.path.join(pwd, "nodes")
    os.chdir(path) 
    print os.getcwd()