In [ ]:
    
import os
from __future__ import print_function
import ptha_paths
try:
    os.chdir(ptha_paths.ptha_dir)
    print("\nAppears to be ok")
except:
    print("\nProblem moving to directory %s" % ptha_paths.ptha_dir)  
    print("Check the path set in the file ptha_paths.py")