--- a/configmix/variables.py	Thu Apr 07 23:23:17 2016 +0200
+++ b/configmix/variables.py	Tue Apr 19 12:22:15 2016 +0200
@@ -35,9 +35,30 @@
     raise KeyError("key %r not found in the namespace" % name)
 
 
+def _pylookup(name, default=_MARKER):
+    """Lookup a Python specific variable"""
+    import platform
+    if name == "version":
+        return u(platform.python_version())
+    elif name == "implementation":
+        return  u(platform.python_implementation())
+    elif name == "version_maj_min":
+        t = platform.python_version_tuple()
+        return u('.'.join(t[:2]))
+    elif name == "version_maj":
+        t = platform.python_version_tuple()
+        return u(t[0])
+    else:
+        if default is _MARKER:
+            raise KeyError("variable %r not found in namespace PY" % name)
+        else:
+            return default
+
+
 _varns_registry = {
     "ENV": _envlookup,
-    "OS": _oslookup
+    "OS": _oslookup,
+    "PY": _pylookup
 }