diff --git a/scripts/roa.py b/scripts/roa.py
index db92a5b..67634a1 100755
--- a/scripts/roa.py
+++ b/scripts/roa.py
@@ -193,12 +193,10 @@ if __name__ == "__main__":
             as_route4 = list()
             as_route6 = list()
             vkeys = [k for k in VALID_KEYS if k != 'asn']
-            for r in roa4:
-                if r['asn'] == asn:
-                    as_route4.append({k:v for k, v in r.items() if k in vkeys})
-            for r in roa6:
-                if r['asn'] == asn:
-                    as_route6.append({k:v for k, v in r.items() if k in vkeys})
+            for roa, as_route in ((roa4, as_route4), (roa6, as_route6)):
+                for r in roa:
+                    if r['asn'] == asn:
+                        as_route.append({k:v for k, v in r.items() if k in vkeys})
             owner = asi['owner']
             peopledict = d_output['people'].setdefault(owner, {"info": PEOPLE[owner], "asns": list()})
             peopledict['asns'].append({"asn": asn, "routes": {'ipv4': as_route4, 'ipv6': as_route6}})