SF patch #1438387, PEP 328: relative and absolute imports.

 - IMPORT_NAME takes an extra argument from the stack: the relativeness of
   the import. Only passed to __import__ when it's not -1.

 - __import__() takes an optional 5th argument for the same thing; it
   __defaults to -1 (old semantics: try relative, then absolute)

 - 'from . import name' imports name (be it module or regular attribute)
   from the current module's *package*. Likewise, 'from .module import name'
   will import name from a sibling to the current module.

 - Importing from outside a package is not allowed; 'from . import sys' in a
   toplevel module will not work, nor will 'from .. import sys' in a
   (single-level) package.

 - 'from __future__ import absolute_import' will turn on the new semantics
   for import and from-import: imports will be absolute, except for
   from-import with dots.

Includes tests for regular imports and importhooks, parser changes and a
NEWS item, but no compiler-package changes or documentation changes.

1 files changed, 1 insertions, 1 deletions

diff --git a/Grammar/Grammar b/Grammar/Grammar
index fd274fa..08c8a00 100644
--- a/Grammar/Grammar
+++ b/Grammar/Grammar
@@ -59,7 +59,7 @@ yield_stmt: yield_expr
 raise_stmt: 'raise' [test [',' test [',' test]]]
 import_stmt: import_name | import_from
 import_name: 'import' dotted_as_names
-import_from: ('from' ('.')* dotted_name
+import_from: ('from' ('.'* dotted_name | '.')
               'import' ('*' | '(' import_as_names ')' | import_as_names))
 import_as_name: NAME [NAME NAME]
 dotted_as_name: dotted_name [NAME NAME]