python2 downgrade/ extra check for pure forecast vs one day forecast

source/python/mods/get_mars_data.py

-#!/usr/bin/env python3
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 #*******************************************************************************
 # @Author: Anne Fouilloux (University of Oslo)
@@ -56,6 +56,8 @@ Read the documentation for usage instructions.
 # ------------------------------------------------------------------------------
 # MODULES
 # ------------------------------------------------------------------------------
+from __future__ import print_function
+
 import os
 import sys
 import inspect
@@ -272,6 +274,10 @@ def mk_dates(c, fluxes):
     if c.basetime == 0:
         start = start - timedelta(days=1)
 
+    if c.purefc and fluxes and c.maxstep < 24:
+        start = start - timedelta(days=1)
+        end = end + timedelta(days=1)
+
     if not c.purefc and fluxes and not c.basetime == 0:
         start = start - timedelta(days=1)
         end = end + timedelta(days=1)