PEP8 cleanup

compiler/drc/design_rules.py

@@ -9,6 +9,7 @@ import debug
 from drc_value import *
 from drc_lut import *
 
+
 class design_rules(dict):
     """
     This is a class that implements the design rules structures.

compiler/drc/drc_lut.py

@@ -7,6 +7,7 @@
 #
 import debug
 
+
 class drc_lut():
     """
     Implement a lookup table of rules.
@@ -32,15 +33,14 @@ class drc_lut():
             if self.match(key, table_key):
                 return self.table[table_key]
 
-
     def match(self, key1, key2):
         """
         Determine if key1>=key2 for all tuple pairs.
         (i.e. return false if key1<key2 for any pair.)
         """
         # If any one pair is less than, return False
-        debug.check(len(key1)==len(key2),"Comparing invalid key lengths.")
+        debug.check(len(key1) == len(key2), "Comparing invalid key lengths.")
-        for k1,k2 in zip(key1,key2):
+        for k1, k2 in zip(key1, key2):
             if k1 < k2:
                 return False
         return True

compiler/drc/drc_value.py

@@ -6,6 +6,7 @@
 # All rights reserved.
 #
 
+
 class drc_value():
     """
     A single DRC value.