Replace .next() calls with next() function

cassandra/connection.py

@@ -355,7 +355,7 @@ class Connection(object):
                           locally_supported_compressions.keys(),
                           remote_supported_compressions)
             else:
-                compression_type = iter(overlap).next()  # choose any
+                compression_type = next(iter(overlap))  # choose any
                 # set the decompressor here, but set the compressor only after
                 # a successful Ready message
                 self._compressor, self.decompressor = \

cassandra/pool.py

@@ -185,7 +185,7 @@ class _ReconnectionHandler(object):
         try:
             conn = self.try_reconnect()
         except Exception as exc:
-            next_delay = self.schedule.next()
+            next_delay = next(self.schedule)
             if self.on_exception(exc, next_delay):
                 self.scheduler.schedule(next_delay, self.run)
         else:

cassandra/util.py

@@ -79,9 +79,9 @@ except ImportError:
             if not self:
                 raise KeyError('dictionary is empty')
             if last:
-                key = reversed(self).next()
+                key = next(reversed(self))
             else:
-                key = iter(self).next()
+                key = next(iter(self))
             value = self.pop(key)
             return key, value