Missing import fix.

compiler/base/hierarchy_layout.py

@@ -13,6 +13,7 @@ from tech import drc, GDS
 from tech import layer as techlayer
 from tech import layer_indices
 from tech import layer_stacks
+from tech import preferred_directions
 import os
 from globals import OPTS
 from vector import vector

compiler/tests/06_hierarchical_predecode2x4_test.py

@@ -8,13 +8,14 @@
 #
 import unittest
 from testutils import *
-import sys,os
+import sys, os
 sys.path.append(os.getenv("OPENRAM_HOME"))
 import globals
 from globals import OPTS
 from sram_factory import factory
 import debug
 
+
 class hierarchical_predecode2x4_test(openram_test):
 
     def runTest(self):

compiler/tests/06_hierarchical_predecode3x8_test.py

@@ -8,13 +8,14 @@
 #
 import unittest
 from testutils import *
-import sys,os
+import sys, os
 sys.path.append(os.getenv("OPENRAM_HOME"))
 import globals
 from globals import OPTS
 from sram_factory import factory
 import debug
 
+
 class hierarchical_predecode3x8_test(openram_test):
 
     def runTest(self):

compiler/tests/06_hierarchical_predecode4x16_test.py

@@ -16,7 +16,6 @@ from sram_factory import factory
 import debug
 
 
-# @unittest.skip("SKIPPING hierarchical_predecode4x16_test")
 class hierarchical_predecode4x16_test(openram_test):
 
     def runTest(self):