docs: Update dictConfig snippet (#885)

* docs: Update `dictConfig` snippet to add line that applies the config

* Added `import logging.config` into snippet

* Update root handlers dict entry in dictConfig

* Update usage_guide.py

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* Remove propagate config option from loggers

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* Added test for dictConfig snippet

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

---------

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

samples/snippets/usage_guide.py

@@ -486,33 +486,36 @@ def setup_logging(client):
 
 @snippet
 def logging_dict_config(client):
+    # [START logging_dict_config]
     import logging.config
 
-    # [START logging_dict_config]
     import google.cloud.logging
 
     client = google.cloud.logging.Client()
 
     LOGGING = {
         "version": 1,
         "handlers": {
-            "cloud_logging": {
+            "cloud_logging_handler": {
                 "class": "google.cloud.logging.handlers.CloudLoggingHandler",
                 "client": client,
             },
-            "structured_log": {
+            "structured_log_handler": {
                 "class": "google.cloud.logging.handlers.StructuredLogHandler"
             },
         },
-        "root": {"handlers": ["console"], "level": "WARNING"},
+        "root": {"handlers": [], "level": "WARNING"},
         "loggers": {
-            "my_logger": {"handlers": ["cloud_logging"], "level": "INFO"},
-            "my_other_logger": {"handlers": ["structured_log"], "level": "INFO"},
+            "cloud_logger": {"handlers": ["cloud_logging_handler"], "level": "INFO"},
+            "structured_logger": {
+                "handlers": ["structured_log_handler"],
+                "level": "INFO",
+            },
         },
     }
-    # [END logging_dict_config]
 
     logging.config.dictConfig(LOGGING)
+    # [END logging_dict_config]
 
 
 def _line_no(func):

samples/snippets/usage_guide_test.py

@@ -88,3 +88,9 @@ def test_client_list_entries():
 
     for item in to_delete:
         usage_guide._backoff_not_found(item.delete)
+
+
+def test_dict_config():
+    client = Client()
+
+    usage_guide.logging_dict_config(client)