syntax fixes

Author: orbeckst

pmda/leaflet.py

@@ -20,6 +20,7 @@
 
 """
 from __future__ import absolute_import, division
+import warnings
 
 import numpy as np
 import dask.bag as db
@@ -265,7 +266,7 @@ def run(self,
         if n_jobs == -1:
             if scheduler == 'multiprocessing':
                 n_jobs = cpu_count()
-            else
+            else:
                 try:
                     from dask import distributed
                     if isinstance(scheduler, distributed.Client):