diff --git a/dagrt/codegen/python.py b/dagrt/codegen/python.py
index 0d1cd1e29ab59b972de51d7e8ed5f29e8649b31b..a749e0e1985084cfbb65e56c8d19ab40563d5013 100644
--- a/dagrt/codegen/python.py
+++ b/dagrt/codegen/python.py
@@ -445,8 +445,7 @@ class CodeGenerator(StructuredCodeGenerator):
         else:
             assign_code = (
                     ", ".join(self._name_manager[n] for n in inst.assignees)
-                    +
-                    " = ")
+                    + " = ")
 
         from pymbolic import var
         self._emit(
diff --git a/dagrt/codegen/transform.py b/dagrt/codegen/transform.py
index 578a8cfcb4c71b5c9e378da2b46db63b25af7d7c..ea8831e26fca4584860b0f6d75ff19cf47204f6d 100644
--- a/dagrt/codegen/transform.py
+++ b/dagrt/codegen/transform.py
@@ -336,16 +336,20 @@ class IfThenElseExpander(IdentityMapper):
                 expression=rec_then,
                 id=then_stmt_id,
                 depends_on=(
-                    base_deps | frozenset(sub_then_deps) |
-                    frozenset([if_stmt_id]))),
+                    base_deps
+                    | frozenset(sub_then_deps)
+                    | frozenset([if_stmt_id]))),
             AssignExpression(
                 assignee=tmp_result,
                 assignee_subscript=(),
                 condition=else_condition,
                 expression=rec_else,
                 id=else_stmt_id,
-                depends_on=base_deps | frozenset(sub_else_deps) |
-                frozenset([if_stmt_id]))])
+                depends_on=(
+                    base_deps
+                    | frozenset(sub_else_deps)
+                    | frozenset([if_stmt_id])))
+                ])
 
         extra_deps.extend([then_stmt_id, else_stmt_id])
         return var(tmp_result)
diff --git a/dagrt/expression.py b/dagrt/expression.py
index 9c3b83e7e6e8943863ff16bb5c7323ef321eb252..24b97ccde650ac2d1ef65bd59da65de748ca2f4f 100644
--- a/dagrt/expression.py
+++ b/dagrt/expression.py
@@ -294,8 +294,8 @@ class _ExtendedUnifier(UnidirectionalUnifier):
 
         variables = set(
             term for term in expr.children
-            if isinstance(term, Variable) and
-            term.name in self.lhs_mapping_candidates)
+            if isinstance(term, Variable)
+            and term.name in self.lhs_mapping_candidates)
 
         from pymbolic.mapper.unifier import unify_many
 
diff --git a/dagrt/language.py b/dagrt/language.py
index 307d51a7ed5123fa09159bbe62dec90310344c91..a5d3ca88f6d01033e1f09285a62d3bf34b578a73 100644
--- a/dagrt/language.py
+++ b/dagrt/language.py
@@ -1067,8 +1067,9 @@ class CodeBuilder(object):
             # Warn about potential ordering of assignments that may
             # be unexpected by the user.
             if assignee in context.used_variables:
-                raise ValueError("write after use of " + assignee +
-                                 " in the same block")
+                raise ValueError(
+                        "write after use of " + assignee
+                        + " in the same block")
 
             if (
                     assignee in context.definition_map
diff --git a/dagrt/utils.py b/dagrt/utils.py
index e0ddb55666b34ec063a361bde30002164349ccc3..bda471464a86b83f579aaa8b57468dfdd3cba771 100644
--- a/dagrt/utils.py
+++ b/dagrt/utils.py
@@ -213,8 +213,9 @@ def run_fortran(sources, fortran_options=None):
                     file=sys.stderr)
 
         if stderr_data:
-            raise RuntimeError("Fortran code has non-empty stderr:\n" +
-                               stderr_data.decode('ascii'))
+            raise RuntimeError(
+                    "Fortran code has non-empty stderr:\n"
+                    + stderr_data.decode('ascii'))
 
         return p.returncode, stdout_data, stderr_data