share.py

import os

def validate_directory_exists(path):
    return os.path.exists(path)

class SharedImageDirectory(object):

    def __init__(self, path): # create at session startup, validate
        self.path = path

        if not validate_directory_exists(path):
            raise InvalidDirectoryError(f'Invalid directory:\n{path}')


class InvalidDirectoryError(Exception):
    pass