Smart Key - Python Source Code

When the Jedi identifier server or the OO-Browser has been loaded and the press is
within a Python buffer:
  ACTION KEY or ASSIST KEY
     Jumps to the definition of the selected Python construct:
     (1) on an ‘import’ line, the referent is displayed;
     (2) within a method declaration, its definition is displayed;
     (3) on a class name, the class definition is shown;
     (4) on a unique identifier reference, its definition is shown (when
         possible).

When pressed within a Python source code file (without the OO-Browser):
  ACTION KEY
     Jumps to the definition of the selected Python identifier,
     assuming the identifier is found within an "etags" generated
     tags file within the current directory or any of its ancestor
     directories.
  ASSIST KEY
     Jumps to the next tag matching an identifier at point.