fix can't use examples helpers on non app context based environment (#18086)

superset/examples/data_loading.py

@@ -0,0 +1,35 @@
+#  Licensed to the Apache Software Foundation (ASF) under one
+#  or more contributor license agreements.  See the NOTICE file
+#  distributed with this work for additional information
+#  regarding copyright ownership.  The ASF licenses this file
+#  to you under the Apache License, Version 2.0 (the
+#  "License"); you may not use this file except in compliance
+#  with the License.  You may obtain a copy of the License at
+#
+#  http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing,
+#  software distributed under the License is distributed on an
+#  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+#  KIND, either express or implied.  See the License for the
+#  specific language governing permissions and limitations
+#  under the License.
+# pylint: disable=unused-import
+from .bart_lines import load_bart_lines
+from .big_data import load_big_data
+from .birth_names import load_birth_names
+from .country_map import load_country_map_data
+from .css_templates import load_css_templates
+from .deck import load_deck_dash
+from .energy import load_energy
+from .flights import load_flights
+from .long_lat import load_long_lat_data
+from .misc_dashboard import load_misc_dashboard
+from .multi_line import load_multi_line
+from .multiformat_time_series import load_multiformat_time_series
+from .paris import load_paris_iris_geojson
+from .random_time_series import load_random_time_series_data
+from .sf_population_polygons import load_sf_population_polygons
+from .tabbed_dashboard import load_tabbed_dashboard
+from .utils import load_examples_from_configs
+from .world_bank import load_world_bank_health_n_pop