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.
diff --git a/Parser/Python.asdl b/Parser/Python.asdl
index 11c9665..bcb5ecb 100644
--- a/Parser/Python.asdl
+++ b/Parser/Python.asdl
@@ -34,7 +34,7 @@
| Assert(expr test, expr? msg)
| Import(alias* names)
- | ImportFrom(identifier module, alias* names)
+ | ImportFrom(identifier module, alias* names, int? level)
-- Doesn't capture requirement that locals must be
-- defined if globals is