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1 files changed, 38 insertions, 0 deletions

diff --git a/lib/python2.7/importlib/__init__.py b/lib/python2.7/importlib/__init__.py
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+++ b/lib/python2.7/importlib/__init__.py
@@ -0,0 +1,38 @@
+"""Backport of importlib.import_module from 3.x."""
+# While not critical (and in no way guaranteed!), it would be nice to keep this
+# code compatible with Python 2.3.
+import sys
+
+def _resolve_name(name, package, level):
+    """Return the absolute name of the module to be imported."""
+    if not hasattr(package, 'rindex'):
+        raise ValueError("'package' not set to a string")
+    dot = len(package)
+    for x in xrange(level, 1, -1):
+        try:
+            dot = package.rindex('.', 0, dot)
+        except ValueError:
+            raise ValueError("attempted relative import beyond top-level "
+                              "package")
+    return "%s.%s" % (package[:dot], name)
+
+
+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]