Re: Python interactive navigation around nested functions

["Andreas Röhler" <andreas.roehler@online.de>]

On 20.06.2016 04:43, Stefan Monnier wrote:
>>          def wwrap(f):
>>              print 'Inside wwrap()'
>>              def wrapped_f(*args):
>>                  print 'Inside wrapped_f()'
>>                  print 'Decorator arguments:', arg1, arg2, arg3
>>                  f(*args)
>>                  print 'After f(*args)'
>>              return wrapped_f
>>          return wwrap
>> The point is on "return wrapped_f".  The user then hits C-M-a to navigate
>> to the beginning of the current function.  The point is unambiguously
>> inside wwrap() and not inside wrapped_f(), so I claim it should end up
>> at the "def wwrap(f)" line.  However the current behavior (and that test
>> suite check) say it should end up on "def "wrapped_f()".
> [ Note: the below is the view from the generic side of Emacs, because
>    I don't know much about Python in general and python-mode
>    in particular.  ]
>
> Traditionally (IMO), C-M-a goes to the nearest beginning of defun at the
> same AST level or higher.  So from "return wrapped_f", it seems reasonable
> to jump to "def wrapped_f(*args):".
>
> If you want to jump to the beginning of the enclosing defun, I think we
> need another function, which currently doesn't exist in the "generic"
> part of Emacs.  If C-M-a always jumped to the beginning of the enclosing
> defun, then it would always jump to BOB when called from outside
> a function, and that's clearly not how it behaves usually.
>
>
>          Stefan
>
>


It's not about jumping to enclosing function --which would mean upwards--
but reaching the AST level entry node.

This is a bug, noted for python-mode.el too:
https://bugs.launchpad.net/python-mode/+bug/1594263