CASSPYTHON-18: removed obsolete check for python version > 3.7+

Author: bschoening

cassandra/cluster.py

@@ -1424,26 +1424,26 @@ def _create_thread_pool_executor(self, **kwargs):
         :return: A ThreadPoolExecutor instance.
         """
         tpe_class = ThreadPoolExecutor
-        if sys.version_info[0] >= 3 and sys.version_info[1] >= 7:
-            try:
-                from cassandra.io.eventletreactor import EventletConnection
-                is_eventlet = issubclass(self.connection_class, EventletConnection)
-            except:
-                # Eventlet is not available or can't be detected
-                return tpe_class(**kwargs)
 
-            if is_eventlet:
-                try:
-                    from futurist import GreenThreadPoolExecutor
-                    tpe_class = GreenThreadPoolExecutor
-                except ImportError:
-                    # futurist is not available
-                    raise ImportError(
-                        ("Python 3.7+ and Eventlet cause the `concurrent.futures.ThreadPoolExecutor` "
-                         "to hang indefinitely. If you want to use the Eventlet reactor, you "
-                         "need to install the `futurist` package to allow the driver to use "
-                         "the GreenThreadPoolExecutor. See https://github.com/eventlet/eventlet/issues/508 "
-                         "for more details."))
+        try:
+            from cassandra.io.eventletreactor import EventletConnection
+            is_eventlet = issubclass(self.connection_class, EventletConnection)
+        except ImportError:
+            # Eventlet is not available or can't be detected
+            return tpe_class(**kwargs)
+
+        if is_eventlet:
+            try:
+                from futurist import GreenThreadPoolExecutor
+                tpe_class = GreenThreadPoolExecutor
+            except ImportError:
+                # futurist is not available
+                raise ImportError(
+                    ("Python 3.7+ and Eventlet cause the `concurrent.futures.ThreadPoolExecutor` "
+                     "to hang indefinitely. If you want to use the Eventlet reactor, you "
+                     "need to install the `futurist` package to allow the driver to use "
+                     "the GreenThreadPoolExecutor. See https://github.com/eventlet/eventlet/issues/508 "
+                     "for more details."))
 
         return tpe_class(**kwargs)