Merge pull request #128 from niklassiemer/patch-1

Fix syntax typo

calphy/scheduler.py

@@ -106,7 +106,7 @@ def __init__(self, options, cores=1, directory=os.getcwd()):
         for (key, val) in options.items():
             if key in self.queueoptions.keys():
                 if val is not None:
-                    if val is not "":
+                    if val != "":
                         self.queueoptions[key] = val
         self.maincommand = ""