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

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

qa/rpc-tests/wallet_1941.py

@@ -6,10 +6,12 @@
 # This is a regression test for #1941.
 
 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, \
+    initialize_datadir, start_nodes, start_node, connect_nodes_bi, \
+    bitcoind_processes
 
-import sys
+import time
+from decimal import Decimal
 
 starttime = 1388534400
 
@@ -49,7 +51,7 @@ class Wallet1941RegressionTest (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":