Project folder generator(Python 3)

folder_gen.py

import json
from os import path
from os import walk
from os import mkdir


class Folder_gen(object):
    def __init__(self):
        self.config_name = 'config.cfg'
        self.config = {}
        if path.exists(self.config_name):
            self.read_json()

    def __call__(self, *args, **kwargs):
        print(self.config.items())

    def set_default_folder_structure(self):
        self.config['Folders'] = ['Rename_me',
                                  'Rename_me/c4d',
                                  'Rename_me/mov',
                                  'Rename_me/avi']

    def set_projects_folder(self, project_folder=path.normpath(path.abspath('.'))):
        self.config['Projects folder'] = project_folder.replace('\\', '/')

    def folder_structure_read(self, folder='.'):
        subfolders = [path.normpath(path.relpath(i[0])).replace('\\', '/') for i in walk(folder)][1:]
        print(subfolders)
        # self.config = json.dumps({'Folders': subfolders}, indent=1)
        self.config['Folders'] = subfolders

    def folder_structure_create(self, project_path=None):
        if not project_path:
            project_path = self.config.get('Projects folder')
        folders = self.config.get('Folders')
        if folders:
            new_dirs = [path.abspath(path.join(project_path, i)) for i in folders]
            for i in new_dirs:
                try:
                    mkdir(i)
                except FileExistsError:
                    print(i, 'already exists')
                except FileNotFoundError:
                    print(i, 'is a wrong path, please check the projects folder')
        else:
            raise BaseException('Config file empty of missing')

    def write_json(self):
        with open(self.config_name, 'w') as configfile:
            configfile.write(json.dumps(self.config, indent=1))

    def read_json(self):
        with open(self.config_name, 'r') as configfile:
            self.config = json.load(configfile)

if __name__ == 'folder_gen.py':
    fg = Folder_gen()

    while True:
        user_choice = input('''
        1) Remember folder structure
        2) Create folder structure in {}
        3) Change the folder containing projects
        4) Load example folder structure
        5) Exit
    
    '''.format(fg.config.get('Projects folder')))

        if user_choice in set('12345'):
            user_choice = int(user_choice)
        else:
            print('\tWrong number')

        if user_choice == 1:
            fg.folder_structure_read()
            fg.set_projects_folder()
            fg.write_json()
        elif user_choice == 2:
            fg.read_json()
            fg.folder_structure_create()
        elif user_choice == 3:
            abs_dir = input('Enter path (default is current dir)')
            if abs_dir == '':
                abs_dir = path.abspath('.')
            fg.read_json()
            fg.set_projects_folder(abs_dir)
            fg.write_json()
            print('\tProjects folder has been set to:', fg.config.get('Projects folder'))
        elif user_choice == 4:
            fg.set_default_folder_structure()
            fg.write_json()
        elif user_choice == 5:
            break