update scripts for python3

scripts/txradar

@@ -1,9 +1,9 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import util, sys
 try:
     tx = sys.argv[1]
 except:
-    print "usage: txradar txid"
+    print("usage: txradar txid")
     sys.exit(1)
 
 peers = util.get_peers()
@@ -15,5 +15,5 @@ r2 = []
 for k, v in results.items():
     (r1 if v else r2).append(k)
 
-print "Received %d answers"%len(results)
-print "Propagation rate: %.1f percent" % (len(r1) *100./(len(r1)+ len(r2)))
+print("Received %d answers"%len(results))
+print("Propagation rate: %.1f percent" % (len(r1) *100./(len(r1)+ len(r2))))