title: how to add a custom_folder to ""./odoo.py --addons=./addons"
body: <p>Please let me know how to add a folder(eg:custom_module) to ""./odoo.py --addons=./addons" in odoo9</p>
  
  <p>i am trying to add custom_module to """./odoo.py --addons=./addons". then getting below error</p>
  
  <p>odoo.py: error: option --addons-path: The addons-path './custom_module' does not seem to a be a valid Addons Directory!</p>