[Python] How to get the parent dir location

this code is get the templates/blog1/page.html in b.py:

path = os.path.join(os.path.dirname(__file__), os.path.join('templates', 'blog1/page.html'))


but i want to get the parent dir location:

aParent
|--a
| |---b.py
| |---templates
| |--------blog1
| |-------page.html
|--templates
|--------blog1
|-------page.html


and how to get the aParent location

thanks

updated:

this is right:

dirname=os.path.dirname
path = os.path.join(dirname(dirname(__file__)), os.path.join('templates', 'blog1/page.html'))


or

path = os.path.abspath(os.path.join(os.path.dirname(__file__),".."))

Continue reading...