Fix bug in indexer

Author: wpreimes

src/smos/smos_l2/download.py

@@ -295,7 +295,7 @@ def sync_period(self, startdate, enddate, dry_run=False):
         ret = []
 
         for year, ys in df.groupby(df.index.year):
-            for month, ms in ys.groupby(df.index.month):
+            for month, ms in ys.groupby(ys.index.month):
                 if len(ms) == monthrange(year, month)[1]:  # complete month (fast)
                     r = self.sync(int(year), int(month), day=None, dry_run=dry_run)
                     ret.append(r)
@@ -315,4 +315,4 @@ def sync_period(self, startdate, enddate, dry_run=False):
         with open(os.path.join(self.local_root, 'overview.yml'), 'w') as f:
             yaml.dump(props, f, default_flow_style=False, sort_keys=False)
 
-        return ret
+        return ret