Repair erroneous "future" symbol

the change in 1e800285508ecd869c6874fed failed to fully
remove the "future" symbol which then got confused against the
import of the "future" package itself, which is also not needed.
remove it entirely.

pin pytest < 6.1 to see if new error condition may be avoided

Change-Id: Ibe45040120d3772c39faef4a61ed26f90b60c79e

2 files changed, 3 insertions, 8 deletions

diff --git a/lib/sqlalchemy/orm/session.py b/lib/sqlalchemy/orm/session.py
index 2574e2bbd..bebe015f7 100644
--- a/lib/sqlalchemy/orm/session.py
+++ b/lib/sqlalchemy/orm/session.py
@@ -29,7 +29,6 @@ from .base import state_str
 from .unitofwork import UOWTransaction
 from .. import engine
 from .. import exc as sa_exc
-from .. import future
 from .. import sql
 from .. import util
 from ..inspection import inspect
@@ -124,7 +123,6 @@ class ORMExecuteState(util.MemoizedSlots):
         "_compile_state_cls",
         "_starting_event_idx",
         "_events_todo",
-        "_future",
         "_update_execution_options",
     )
 
@@ -137,7 +135,6 @@ class ORMExecuteState(util.MemoizedSlots):
         bind_arguments,
         compile_state_cls,
         events_todo,
-        future,
     ):
         self.session = session
         self.statement = statement
@@ -149,7 +146,6 @@ class ORMExecuteState(util.MemoizedSlots):
         self.bind_arguments = bind_arguments
         self._compile_state_cls = compile_state_cls
         self._events_todo = list(events_todo)
-        self._future = future
 
     def _remaining_events(self):
         return self._events_todo[self._starting_event_idx + 1 :]
@@ -1504,7 +1500,7 @@ class Session(_SessionClassMethods):
         elif not bind_arguments:
             bind_arguments = {}
 
-        if future and (
+        if (
             statement._propagate_attrs.get("compile_state_plugin", None)
             == "orm"
         ):
@@ -1551,7 +1547,6 @@ class Session(_SessionClassMethods):
                 bind_arguments,
                 compile_state_cls,
                 events_todo,
-                future,
             )
             for idx, fn in enumerate(events_todo):
                 orm_exec_state._starting_event_idx = idx
@@ -2117,7 +2112,7 @@ class Session(_SessionClassMethods):
 
         with_for_update = query.ForUpdateArg._from_argument(with_for_update)
 
-        stmt = future.select(object_mapper(instance))
+        stmt = sql.select(object_mapper(instance))
         if (
             loading.load_on_ident(
                 self,
diff --git a/tox.ini b/tox.ini
index aeef37b91..d62db1c25 100644
--- a/tox.ini
+++ b/tox.ini
@@ -15,7 +15,7 @@ install_command=python -m pip install {env:TOX_PIP_OPTS:} {opts} {packages}
 usedevelop=
      cov: True
 
-deps=pytest!=3.9.1,!=3.9.2
+deps=pytest<6.1
      pytest-xdist
      greenlet
      mock; python_version < '3.3'