Only use PugL1bTools as it extends PugFile (simplify)

modules/deeplearning/amv_raob.py

@@ -698,6 +698,24 @@ def get_interpolated_scalar(ds_0, ds_1, time0, time1, fld_name, time, lons, lats
     return intrp_vals
 
 
+path_to_reader_dict = {}
+
+
+def get_reader(path):
+    if len(path_to_reader_dict) > 50:
+        path_to_reader_dict.clear()
+
+    rdr = path_to_reader_dict.get(path)
+    if rdr is None:
+        rdr = PugL1bTools(path)
+        path_to_reader_dict[path] = rdr
+    return rdr
+
+
+def clear_readers():
+    path_to_reader_dict.clear()
+
+
 def get_images(lons, lats, timestamp, channel_list, half_width, step, do_norm=False, daynight='ANY'):
     global geoloc_2km, geoloc_1km, geoloc_hkm
 
@@ -727,7 +745,7 @@ def get_images(lons, lats, timestamp, channel_list, half_width, step, do_norm=Fa
 
         # Navigation, convert to BT/REFL
         try:
-            pug_l1b_c = PugL1bTools(local_path)
+            pug_l1b_c = get_reader(local_path)
         except Exception as exc:
             print(exc)
             return None, None, None, None
@@ -747,7 +765,7 @@ def get_images(lons, lats, timestamp, channel_list, half_width, step, do_norm=Fa
 
             # Navigation, convert to BT/REFL
             try:
-                pug_l1b_l = PugL1bTools(local_path_l)
+                pug_l1b_l = get_reader(local_path_l)
             except Exception as exc:
                 print(exc)
                 return None, None, None, None
@@ -765,7 +783,7 @@ def get_images(lons, lats, timestamp, channel_list, half_width, step, do_norm=Fa
 
             # Navigation, convert to BT/REFL
             try:
-                pug_l1b_r = PugL1bTools(local_path_r)
+                pug_l1b_r = get_reader(local_path_r)
             except Exception as exc:
                 print(exc)
                 return None, None, None, None