Clean up imports to be pyflakes-checkable. fixes #2450

Signed-off-by: Daira Hopwood <daira@jacaranda.org>

qa/rpc-tests/wallet_treestate.py

@@ -5,10 +5,11 @@
 
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
-from time import *
+from test_framework.util import assert_equal, initialize_chain_clean, \
+    start_nodes, connect_nodes_bi
 
-import sys
+import time
+from decimal import Decimal
 
 class WalletTreeStateTest (BitcoinTestFramework):
 
@@ -35,7 +36,7 @@ class WalletTreeStateTest (BitcoinTestFramework):
         for x in xrange(1, timeout):
             results = self.nodes[0].z_getoperationresult(opids)
             if len(results)==0:
-                sleep(1)
+                time.sleep(1)
             else:
                 status = results[0]["status"]
                 if status == "failed":
@@ -106,7 +107,7 @@ class WalletTreeStateTest (BitcoinTestFramework):
             status = results[0]["status"]
             if status == "executing":
                 break
-            sleep(1)
+            time.sleep(1)
 
         # Now mine Tx 1 which will change global treestate before Tx 2's second joinsplit begins processing
         self.sync_all()