Lukas issue339 feat filter with future mix

todos

• there is an issue with the FIR plotting. See filenames in screenshot. Names should be f"FIR_{self._name}_{str(var)}_{it0}_{ifilter}" and I would expect the names to have always a 0 in the last position (when only spliting LT/ST). Check out the error

mlair/data_handler/data_handler_single_station.py

@@ -276,6 +276,7 @@ class DataHandlerSingleStation(AbstractDataHandler):
         filename = os.path.join(self.lazy_path, hash + ".pickle")
         try:
             if self.overwrite_lazy_data is True:
+                os.remove(filename)
                 raise FileNotFoundError
             with open(filename, "rb") as pickle_file:
                 lazy_data = dill.load(pickle_file)