add import_module from imbortlib and backport for py2.6

wakatime/compat.py

@@ -40,3 +40,38 @@ elif is_py3:
         return str(text)
     open = open
     basestring = (str, bytes)
+
+try:
+    from importlib import import_module
+except ImportError:
+    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]