Enable F841

This is a very useful assertion which prevents unused variables
from being set up allows code to be more readable and sometimes
even more efficient.  test suites seem to be where the most
problems are and there do not seem to be documentation examples
that are using this, or at least the linter is not taking effect
within rst blocks.

Change-Id: I2b3341d8dd14da34879d8425838e66a4b9f8e27d

5 files changed, 11 insertions, 16 deletions

diff --git a/examples/elementtree/adjacency_list.py b/examples/elementtree/adjacency_list.py
index 0f53e0012..0a5a922d0 100644
--- a/examples/elementtree/adjacency_list.py
+++ b/examples/elementtree/adjacency_list.py
@@ -93,6 +93,7 @@ class Document(object):
         self.filename = name
         self.element = element
 
+
 # PART IV - Persistence Mapping
 
 # Node class.  a non-public class which will represent the DB-persisted
@@ -230,8 +231,6 @@ ElementTree.dump(d.element)
 
 
 def find_document(path, compareto):
-    j = documents
-    prev_elements = None
     query = session.query(Document)
     attribute = "_root"
     for i, match in enumerate(
diff --git a/examples/elementtree/optimized_al.py b/examples/elementtree/optimized_al.py
index b089a0170..0ba2d1ea4 100644
--- a/examples/elementtree/optimized_al.py
+++ b/examples/elementtree/optimized_al.py
@@ -239,8 +239,6 @@ ElementTree.dump(d.element)
 
 
 def find_document(path, compareto):
-    j = documents
-    prev_elements = None
     query = session.query(Document)
     first = True
     for i, match in enumerate(
diff --git a/examples/performance/__init__.py b/examples/performance/__init__.py
index f1f59026c..c6244554f 100644
--- a/examples/performance/__init__.py
+++ b/examples/performance/__init__.py
@@ -334,7 +334,7 @@ class Profiler(object):
             if len(sys.argv) > 1:
                 potential_name = sys.argv[1]
                 try:
-                    suite = __import__(__name__ + "." + potential_name)
+                    __import__(__name__ + "." + potential_name)
                 except ImportError:
                     pass
 
@@ -382,7 +382,7 @@ class Profiler(object):
         args.profile = args.profile or args.dump or args.runsnake
 
         if cls.name is None:
-            suite = __import__(__name__ + "." + args.name)
+            __import__(__name__ + "." + args.name)
 
         Profiler(args).run()
 
diff --git a/examples/performance/large_resultsets.py b/examples/performance/large_resultsets.py
index a5f99a283..b7b96453d 100644
--- a/examples/performance/large_resultsets.py
+++ b/examples/performance/large_resultsets.py
@@ -64,7 +64,7 @@ def test_orm_full_objects_list(n):
     """Load fully tracked ORM objects into one big list()."""
 
     sess = Session(engine)
-    objects = list(sess.query(Customer).limit(n))
+    list(sess.query(Customer).limit(n))
 
 
 @Profiler.profile
@@ -108,7 +108,7 @@ def test_core_fetchall(n):
     with engine.connect() as conn:
         result = conn.execute(Customer.__table__.select().limit(n)).fetchall()
         for row in result:
-            data = row["id"], row["name"], row["description"]
+            row["id"], row["name"], row["description"]
 
 
 @Profiler.profile
@@ -124,7 +124,7 @@ def test_core_fetchmany_w_streaming(n):
             if not chunk:
                 break
             for row in chunk:
-                data = row["id"], row["name"], row["description"]
+                row["id"], row["name"], row["description"]
 
 
 @Profiler.profile
@@ -138,7 +138,7 @@ def test_core_fetchmany(n):
             if not chunk:
                 break
             for row in chunk:
-                data = row["id"], row["name"], row["description"]
+                row["id"], row["name"], row["description"]
 
 
 @Profiler.profile
@@ -183,13 +183,11 @@ def _test_dbapi_raw(n, make_objects):
     if make_objects:
         for row in cursor.fetchall():
             # ensure that we fully fetch!
-            customer = SimpleCustomer(
-                id_=row[0], name=row[1], description=row[2]
-            )
+            SimpleCustomer(id_=row[0], name=row[1], description=row[2])
     else:
         for row in cursor.fetchall():
             # ensure that we fully fetch!
-            data = row[0], row[1], row[2]
+            row[0], row[1], row[2]
 
     conn.close()
 
diff --git a/examples/performance/single_inserts.py b/examples/performance/single_inserts.py
index 428eb5c41..2dd87d5b6 100644
--- a/examples/performance/single_inserts.py
+++ b/examples/performance/single_inserts.py
@@ -164,7 +164,7 @@ def _test_dbapi_raw(n, connect):
             conn = engine.pool._creator()
             cursor = conn.cursor()
             cursor.execute(sql, arg)
-            lastrowid = cursor.lastrowid
+            cursor.lastrowid
             conn.commit()
             conn.close()
     else:
@@ -172,7 +172,7 @@ def _test_dbapi_raw(n, connect):
             conn = engine.raw_connection()
             cursor = conn.cursor()
             cursor.execute(sql, arg)
-            lastrowid = cursor.lastrowid
+            cursor.lastrowid
             conn.commit()
             conn.close()