Backport importlib in the form of providing importlib.import_module(). This has
been done purely to help transitions from 2.7 to 3.1.
diff --git a/Lib/importlib.py b/Lib/importlib.py
new file mode 100644
index 0000000..89398de
--- /dev/null
+++ b/Lib/importlib.py
@@ -0,0 +1,38 @@
+"""Backport of importlib.import_module from 3.x."""
+import sys
+
+def _resolve_name(name, package, level):
+ """Return the absolute name of the module to be imported."""
+ level -= 1
+ try:
+ if package.count('.') < level:
+ raise ValueError("attempted relative import beyond top-level "
+ "package")
+ except AttributeError:
+ raise ValueError("__package__ not set to a string")
+ base = package.rsplit('.', level)[0]
+ if name:
+ return "{0}.{1}".format(base, name)
+ else:
+ return base
+
+
+def import_module(name, package=None):
+ """Import a module.
+
+ The 'package' argument is required when performing a relative import. It
+ specifies the package to use as the anchor point from which to resolve the
+ relative import to an absolute import.
+
+ """
+ if name.startswith('.'):
+ if not package:
+ raise TypeError("relative imports require the 'package' argument")
+ level = 0
+ for character in name:
+ if character != '.':
+ break
+ level += 1
+ name = _resolve_name(name[level:], package, level)
+ __import__(name)
+ return sys.modules[name]