Fix some lint errors

There are still two lint errors. They will take more effort.

Signed-off-by: Boyd Johnson <bjohnson@bitwise.io>

addressing/marketplace_addressing/addresser.py

@@ -128,18 +128,20 @@ def address_is(address):
     infix = int(address[6:8], 16)
 
     if _contains(infix, OfferHistorySpace):
-        return AddressSpace.OFFER_HISTORY
+        result = AddressSpace.OFFER_HISTORY
 
     elif _contains(infix, AssetSpace):
-        return AddressSpace.ASSET
+        result = AddressSpace.ASSET
 
     elif _contains(infix, HoldingSpace):
-        return AddressSpace.HOLDING
+        result = AddressSpace.HOLDING
 
     elif _contains(infix, AccountSpace):
-        return AddressSpace.ACCOUNT
+        result = AddressSpace.ACCOUNT
 
     elif _contains(infix, OfferSpace):
-        return AddressSpace.OFFER
+        result = AddressSpace.OFFER
     else:
-        return AddressSpace.OTHER_FAMILY
+        result = AddressSpace.OTHER_FAMILY
+
+    return result

dev_env/Dockerfile

@@ -33,7 +33,7 @@ RUN curl -sL https://deb.nodesource.com/setup_6.x | bash - \
     && apt-get install -y nodejs
 
 RUN pip3 install \
-    pylint==1.7.4 \
+    pylint==1.8.1 \
     pycodestyle==2.3.1 \
     grpcio-tools==1.7.0 \
     nose2==0.7.2 \

ledger_sync/marketplace_ledger_sync/deltas/decoding.py

@@ -39,7 +39,7 @@ def data_to_dicts(address, data):
     """
     data_type = address_is(address)
 
-    if (IGNORE.get(data_type)):
+    if IGNORE.get(data_type):
         return []
 
     try:

ledger_sync/marketplace_ledger_sync/deltas/handlers.py

@@ -16,9 +16,10 @@
 import re
 import logging
 
+from sawtooth_sdk.protobuf.transaction_receipt_pb2 import StateChangeList
+
 from marketplace_ledger_sync.deltas.decoding import data_to_dicts
 from marketplace_ledger_sync.deltas.updating import get_updater
-from sawtooth_sdk.protobuf.transaction_receipt_pb2 import StateChangeList
 from marketplace_addressing.addresser import NS as NAMESPACE