parent.py

def append_parent_path():
    import sys
    import os
    # getting the name of the directory
    # where the this file is present.
    current = os.path.dirname(os.path.realpath(__file__))
    
    # Getting the parent directory name
    # where the current directory is present.
    parent = os.path.dirname(current)
    
    # adding the parent directory to 
    # the sys.path.
    sys.path.append(parent)