update windows build to Python 3.7

Lib/site-packages/sqlalchemy/util/__init__.py

@@ -1,5 +1,5 @@
 # util/__init__.py
-# Copyright (C) 2005-2015 the SQLAlchemy authors and contributors
+# Copyright (C) 2005-2016 the SQLAlchemy authors and contributors
 # <see AUTHORS file>
 #
 # This module is part of SQLAlchemy and is released under

Lib/site-packages/sqlalchemy/util/_collections.py

@@ -1,5 +1,5 @@
 # util/_collections.py
-# Copyright (C) 2005-2015 the SQLAlchemy authors and contributors
+# Copyright (C) 2005-2016 the SQLAlchemy authors and contributors
 # <see AUTHORS file>
 #
 # This module is part of SQLAlchemy and is released under

Lib/site-packages/sqlalchemy/util/compat.py

@@ -1,5 +1,5 @@
 # util/compat.py
-# Copyright (C) 2005-2015 the SQLAlchemy authors and contributors
+# Copyright (C) 2005-2016 the SQLAlchemy authors and contributors
 # <see AUTHORS file>
 #
 # This module is part of SQLAlchemy and is released under
@@ -177,27 +177,27 @@ from operator import attrgetter as dottedgetter
 if py3k:
     def reraise(tp, value, tb=None, cause=None):
         if cause is not None:
+            assert cause is not value, "Same cause emitted"
             value.__cause__ = cause
         if value.__traceback__ is not tb:
             raise value.with_traceback(tb)
         raise value
 
-    def raise_from_cause(exception, exc_info=None):
-        if exc_info is None:
-            exc_info = sys.exc_info()
-        exc_type, exc_value, exc_tb = exc_info
-        reraise(type(exception), exception, tb=exc_tb, cause=exc_value)
 else:
+    # not as nice as that of Py3K, but at least preserves
+    # the code line where the issue occurred
     exec("def reraise(tp, value, tb=None, cause=None):\n"
+         "    if cause is not None:\n"
+         "        assert cause is not value, 'Same cause emitted'\n"
          "    raise tp, value, tb\n")
 
-    def raise_from_cause(exception, exc_info=None):
-        # not as nice as that of Py3K, but at least preserves
-        # the code line where the issue occurred
-        if exc_info is None:
-            exc_info = sys.exc_info()
-        exc_type, exc_value, exc_tb = exc_info
-        reraise(type(exception), exception, tb=exc_tb)
+
+def raise_from_cause(exception, exc_info=None):
+    if exc_info is None:
+        exc_info = sys.exc_info()
+    exc_type, exc_value, exc_tb = exc_info
+    cause = exc_value if exc_value is not exception else None
+    reraise(type(exception), exception, tb=exc_tb, cause=cause)
 
 if py3k:
     exec_ = getattr(builtins, 'exec')

Lib/site-packages/sqlalchemy/util/deprecations.py

@@ -1,5 +1,5 @@
 # util/deprecations.py
-# Copyright (C) 2005-2015 the SQLAlchemy authors and contributors
+# Copyright (C) 2005-2016 the SQLAlchemy authors and contributors
 # <see AUTHORS file>
 #
 # This module is part of SQLAlchemy and is released under

Lib/site-packages/sqlalchemy/util/langhelpers.py

@@ -1,5 +1,5 @@
 # util/langhelpers.py
-# Copyright (C) 2005-2015 the SQLAlchemy authors and contributors
+# Copyright (C) 2005-2016 the SQLAlchemy authors and contributors
 # <see AUTHORS file>
 #
 # This module is part of SQLAlchemy and is released under
@@ -59,6 +59,13 @@ class safe_reraise(object):
             self._exc_info = None   # remove potential circular references
             compat.reraise(exc_type, exc_value, exc_tb)
         else:
+            if not compat.py3k and self._exc_info and self._exc_info[1]:
+                # emulate Py3K's behavior of telling us when an exception
+                # occurs in an exception handler.
+                warn(
+                    "An exception has occurred during handling of a "
+                    "previous exception.  The previous exception "
+                    "is:\n %s %s\n" % (self._exc_info[0], self._exc_info[1]))
             self._exc_info = None   # remove potential circular references
             compat.reraise(type_, value, traceback)
 

Lib/site-packages/sqlalchemy/util/queue.py

@@ -1,5 +1,5 @@
 # util/queue.py
-# Copyright (C) 2005-2015 the SQLAlchemy authors and contributors
+# Copyright (C) 2005-2016 the SQLAlchemy authors and contributors
 # <see AUTHORS file>
 #
 # This module is part of SQLAlchemy and is released under

Lib/site-packages/sqlalchemy/util/topological.py

@@ -1,5 +1,5 @@
 # util/topological.py
-# Copyright (C) 2005-2015 the SQLAlchemy authors and contributors
+# Copyright (C) 2005-2016 the SQLAlchemy authors and contributors
 # <see AUTHORS file>
 #
 # This module is part of SQLAlchemy and is released under