Fixed issue #104 (FutureWarning: arrays to stack must be passed as a...

Fixed issue #104 (FutureWarning: arrays to stack must be passed as a "sequence" type such as list or tuple.).
Signed-off-by: Daniel Scheffler <danschef@gfz-potsdam.de>

HISTORY.rst

@@ -13,6 +13,7 @@ History
 * Fixed issue #103 ('struct.error: unpack requires a buffer of 4 bytes' within SpatialIndexMediator in case of various
   parallel database accesses) by adding a database lock that blocks parallel database queries.
 * Fixed exception while closing AtmCorr.logger.
+* Fixed issue #104 (FutureWarning: arrays to stack must be passed as a "sequence" type such as list or tuple.).
 
 
 0.18.11 (2020-11-03)

gms_preprocessing/algorithms/L2C_P.py

@@ -118,7 +118,7 @@ class AccuracyCube(GeoArray):
                                                              "CFG.spechomo_bandwise_accuracy is False."
 
         # stack all accuracy layers together
-        accArr = np.dstack(err_layers.values()).astype('int16')
+        accArr = np.dstack(list(err_layers.values())).astype('int16')
 
         # apply int16 nodata value
         accArr[self._GMS_obj.arr.mask_nodata.astype(np.int8) == 0] = get_outFillZeroSaturated('int16')[0]