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diff --git a/src/py_scope.cc b/src/py_scope.cc
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+/*
+ * Copyright (c) 2003-2009, John Wiegley.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * - Neither the name of New Artisans LLC nor the names of its
+ *   contributors may be used to endorse or promote products derived from
+ *   this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "pyinterp.h"
+#include "pyutils.h"
+#include "scope.h"
+
+namespace ledger {
+
+using namespace boost::python;
+
+namespace {
+  void py_scope_define(scope_t& scope, const string& name, expr_t& def)
+  {
+    return scope.define(name, def.get_op());
+  }
+
+  expr_t py_scope_lookup(scope_t& scope, const string& name)
+  {
+    return scope.lookup(name);
+  }
+
+  expr_t py_scope_getattr(scope_t& scope, const string& name)
+  {
+    return scope.lookup(name);
+  }
+
+  struct scope_wrapper : public scope_t
+  {
+    PyObject * self;
+
+    scope_wrapper(PyObject * self_) : self(self_) {}
+
+    virtual expr_t::ptr_op_t lookup(const string&) {
+      return NULL;
+    }    
+  };
+}
+
+void export_scope()
+{
+  class_< scope_t, scope_wrapper, boost::noncopyable > ("Scope", no_init)
+    .def("define", py_scope_define)
+    .def("lookup", py_scope_lookup)
+    .def("resolve", &scope_t::resolve)
+    .def("__getattr__", py_scope_getattr)
+    ;
+}
+
+} // namespace ledger