Add importlib.util.resolve_name().
diff --git a/Lib/importlib/util.py b/Lib/importlib/util.py
index 7b44fa1..1316437 100644
--- a/Lib/importlib/util.py
+++ b/Lib/importlib/util.py
@@ -3,3 +3,19 @@
from ._bootstrap import module_for_loader
from ._bootstrap import set_loader
from ._bootstrap import set_package
+from ._bootstrap import _resolve_name
+
+
+def resolve_name(name, package):
+ """Resolve a relative module name to an absolute one."""
+ if not name.startswith('.'):
+ return name
+ elif not package:
+ raise ValueError('{!r} is not a relative name '
+ '(no leading dot)'.format(name))
+ level = 0
+ for character in name:
+ if character != '.':
+ break
+ level += 1
+ return _resolve_name(name[level:], package, level)