From 7fe9e5704d071ca9b0c9b6244ed9deae8d06fc94 Mon Sep 17 00:00:00 2001
From: Matt Guthaus <mrg@ucsc.edu>
Date: Thu, 29 Aug 2019 16:06:34 -0700
Subject: [PATCH] Convert vcg and nets to ordered dict

---
 compiler/base/hierarchy_layout.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/compiler/base/hierarchy_layout.py b/compiler/base/hierarchy_layout.py
index 26436963..2fea5c61 100644
--- a/compiler/base/hierarchy_layout.py
+++ b/compiler/base/hierarchy_layout.py
@@ -6,6 +6,7 @@
 # All rights reserved.
 #
 import itertools
+import collections
 import geometry
 import gdsMill
 import debug
@@ -839,10 +840,10 @@ class layout():
         #hcg = {}
         
         # Initialize the vertical conflict graph (vcg) and make a list of all pins
-        vcg = {}
+        vcg = collections.OrderedDict()
 
         # Create names for the nets for the graphs
-        nets = {}
+        nets = collections.OrderedDict()
         index = 0
         #print(netlist)
         for pin_list in netlist: