Re: python imports

Hi all,

In order to parse this python code:

from a.b.c import (
    x as xmodule,
    y as ymodule,
    z as zmodule,
    )

I created grammar:

import_stmt
....
  | FROM dotted_name_module IMPORT import_block
    (identity $4)
                    <- lisp code here which prepend "a.b.c" for each found
module?
  ;

import_block
  : PAREN_BLOCK
    (let ((wisent-python-EXPANDING-block t))
      (EXPANDFULL $1 import_block_as_name_list))
  ;

import_block_as_name_list
  : LPAREN
  | RPAREN
  | import_as_name COMMA
  | import_as_name RPAREN
  ;

As a result I get 3 modules: "x", "y", "z". How can i prepend "a.b.c" for
each module?
Also i think parser should create 3 global variables of type 'module':
xmodule, ymodule, zmodule

Thanks,
-Andrey


On 27 September 2014 16:14, Andrey Torba <[email protected]> wrote:

> Hello CEDET developers,
>
> I'm investigating how to parse python's imports for the cases:
>
> 1. from ... import <classes> (works well in current implementation)
>   Example:
>   from a.b.c import Class1, Class2
>
> 2. from ... import <modules> (doesn't work)
>   Example:
>   from a.b.c import module1, module2
>
>   In this case parser must create:
>     - two INCLUDE-TAGs: 'a.b.c.module1' and 'a.b.c.module2'.
>
> When we import something we don't know if it is module or class or
> function... So include-tag should be 'a.b.c.something', 'a.b.c.class1',
> 'a.b.c.module1'. And then in the functions
> 'semantic-dependency-find-file-on-path' and 'semantic-tag-include-filename'
> we can guess which file to open:
>   - a/b/c/something.py
>   - a/b/c.py   class:something
>   - a/b/c/__init__.py    class:something
>
> My question is: how can i build the grammar which makes 2 include tags
> from the string: 'from a.b.c import module1, module2'. I need to remember
> context ('a.b.c') and then build a full module path (format "%s.%s" "a.b.c"
> "module1") ?
>
> Thanks,
> -Andrey
>



-- 
Regards, Andrey

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