Use the variable name _ for unused return values

test/functional/mempool_packages.py

@@ -213,7 +213,7 @@ class MempoolPackagesTest(BitcoinTestFramework):
         value = send_value
 
         # Create tx1
-        (tx1_id, tx1_value) = self.chain_transaction(self.nodes[0], tx0_id, 0, value, fee, 1)
+        tx1_id, _ = self.chain_transaction(self.nodes[0], tx0_id, 0, value, fee, 1)
 
         # Create tx2-7
         vout = 1

test/functional/preciousblock.py

@@ -47,16 +47,16 @@ class PreciousTest(BitcoinTestFramework):
         self.log.info("Ensure submitblock can in principle reorg to a competing chain")
         self.nodes[0].generate(1)
         assert_equal(self.nodes[0].getblockcount(), 1)
-        (hashY, hashZ) = self.nodes[1].generate(2)
+        hashZ = self.nodes[1].generate(2)[-1]
         assert_equal(self.nodes[1].getblockcount(), 2)
         node_sync_via_rpc(self.nodes[0:3])
         assert_equal(self.nodes[0].getbestblockhash(), hashZ)
 
         self.log.info("Mine blocks A-B-C on Node 0")
-        (hashA, hashB, hashC) = self.nodes[0].generate(3)
+        hashC = self.nodes[0].generate(3)[-1]
         assert_equal(self.nodes[0].getblockcount(), 5)
         self.log.info("Mine competing blocks E-F-G on Node 1")
-        (hashE, hashF, hashG) = self.nodes[1].generate(3)
+        hashG = self.nodes[1].generate(3)[-1]
         assert_equal(self.nodes[1].getblockcount(), 5)
         assert(hashC != hashG)
         self.log.info("Connect nodes and check no reorg occurs")

test/functional/test_framework/socks5.py

@@ -91,7 +91,7 @@ class Socks5Connection(object):
                 self.conn.sendall(bytearray([0x01, 0x00]))
 
             # Read connect request
-            (ver,cmd,rsv,atyp) = recvall(self.conn, 4)
+            ver, cmd, _, atyp = recvall(self.conn, 4)
             if ver != 0x05:
                 raise IOError('Invalid socks version %i in connect request' % ver)
             if cmd != Command.CONNECT:

test/functional/wallet-dump.py

@@ -101,7 +101,7 @@ class WalletDumpTest(BitcoinTestFramework):
         self.nodes[0].keypoolrefill()
         self.nodes[0].dumpwallet(tmpdir + "/node0/wallet.encrypted.dump")
 
-        found_addr, found_addr_chg, found_addr_rsv, hd_master_addr_enc = \
+        found_addr, found_addr_chg, found_addr_rsv, _ = \
             read_dump(tmpdir + "/node0/wallet.encrypted.dump", addrs, hd_master_addr_unenc)
         assert_equal(found_addr, test_addr_count)
         assert_equal(found_addr_chg, 90*2 + 50)  # old reserve keys are marked as change now