Fmt.

projects/datalog/src/python/datalog/easy.py

@@ -8,9 +8,18 @@ Easy because it's closer to hand, but no simpler.
 
 from typing import Sequence, Tuple
 
-from datalog.evaluator import join as __join, select as __select
+from datalog.evaluator import (
+    join as __join,
+    select as __select,
+)
 from datalog.reader import read as __read
-from datalog.types import Constant, Dataset, LTuple, LVar, PartlyIndexedDataset
+from datalog.types import (
+    Constant,
+    Dataset,
+    LTuple,
+    LVar,
+    PartlyIndexedDataset,
+)
 
 
 def read(text: str, db_cls=PartlyIndexedDataset):

projects/datalog/src/python/datalog/evaluator.py

@@ -4,7 +4,13 @@ A datalog engine.
 
 from functools import reduce
 
-from datalog.types import CachedDataset, Constant, Dataset, LVar, TableIndexedDataset
+from datalog.types import (
+    CachedDataset,
+    Constant,
+    Dataset,
+    LVar,
+    TableIndexedDataset,
+)
 
 
 def match(tuple, expr, bindings=None):

projects/datalog/src/python/datalog/reader.py

@@ -4,8 +4,17 @@ A datalog reader.
 
 from collections import defaultdict
 
-from datalog.parser import FAILURE, Grammar, ParseError
-from datalog.types import Constant, Dataset, LVar, Rule
+from datalog.parser import (
+    FAILURE,
+    Grammar,
+    ParseError,
+)
+from datalog.types import (
+    Constant,
+    Dataset,
+    LVar,
+    Rule,
+)
 
 
 class Actions(object):