fix DeprecationWarnings

backend/metagenedb/api/catalog/urls.py

 from django.urls import path
-from django.conf.urls import url, include
+from django.conf.urls import include
+from django.urls import re_path
 from rest_framework.routers import DefaultRouter, DynamicRoute, Route
 
 from metagenedb.api.catalog import views
@@ -64,7 +65,7 @@ api_router.register(r'statistics', views.StatisticsViewSet, basename='statistics
 
 
 urlpatterns = [
-    url(r'v1/', include((api_router.urls, 'v1'))),
+    re_path(r'v1/', include((api_router.urls, 'v1'))),
     path('admin/', include(('metagenedb.api.catalog.admin_urls', 'admin'))),
     path('celery-task-test/', test_task_view, name='celery-task-test'),
 ]

backend/metagenedb/common/utils/test_df_operations.py

 from unittest import TestCase
 
 import pandas as pd
-from pandas.util.testing import assert_series_equal
+from pandas.testing import assert_series_equal
 
 from metagenedb.common.utils.df_operations import get_mask
 

backend/metagenedb/urls.py

@@ -14,12 +14,11 @@ Including another URLconf
     2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
 """
 from django.contrib import admin
-from django.urls import include, path
-from django.conf.urls import url
+from django.urls import include, path, re_path
 
 
 urlpatterns = [
     path('api/', include(('metagenedb.api.urls', 'api'))),
     path('admin/', admin.site.urls),
-    url(r'^ht/', include('health_check.urls')),
+    re_path(r'^ht/', include('health_check.urls')),
 ]