What are the naming convention for private member variable, and private and public member function?

[Peng Yu]

Hi,

It says in http://www.python.org/dev/peps/pep-0008/

"    Method Names and Instance Variables

      Use the function naming rules: lowercase with words separated by
      underscores as necessary to improve readability.

      Use one leading underscore only for non-public methods and
instance
      variables."

I am wondering what is the different between member function and
member variable in term of naming convention.

Regards,
Peng