Add minter and burner python interface and test code

python/eth_expire/unittest/base.py

@@ -13,9 +13,6 @@ from chainlib.eth.tx import TxFormat
 from chainlib.eth.contract import ABIContractEncoder
 from chainlib.eth.contract import ABIContractType
 
-# local imports
-from eth_capped import EthCapped
-
 script_dir = os.path.dirname(os.path.realpath(__file__))
 contract_dir = os.path.join(script_dir, '..', '..', 'solidity')
 
@@ -27,8 +24,6 @@ class TestEthExpire(EthTesterCase):
     def setUp(self):
         super(TestEthExpire, self).setUp()
 
-        self.set_method = None
-
         self.conn = RPCConnection.connect(self.chain_spec, 'default')
         nonce_oracle = RPCNonceOracle(self.accounts[0], self.conn)