We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Python `bigquery_create_job` sample is inconsistent with other code samples
The https://github.com/googleapis/python-bigquery/blob/main/samples/create_job.py code sample appears here: https://cloud.google.com/bigquery/docs/running-jobs#running_jobs_using_client_libraries

This sample requires two improvements:

* [ ] That section is about any kind of job, not just queries. As such, it should use the [create_job](https://googleapis.dev/python/bigquery/latest/generated/google.cloud.bigquery.client.Client.html#google.cloud.bigquery.client.Client.create_job) method instead of the more specific `query` method. There should be comments that it is recommended to use the corresponding method for query/copy/load/extract.
* [ ] Remove `job_id_prefix` logic, as labels cover similar functionality and are recommended over custom job IDs.
* [ ] Move the sample to the `samples/snippets` directory. Needs to be done in 2 separate PRs so that the existing samples in the docs don't 404.

--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `samples/create_job.py`
Content:
```
1 # Copyright 2019 Google LLC
2 #
3 # Licensed under the Apache License, Version 2.0 (the "License");
4 # you may not use this file except in compliance with the License.
5 # You may obtain a copy of the License at
6 #
7 #     https://www.apache.org/licenses/LICENSE-2.0
8 #
9 # Unless required by applicable law or agreed to in writing, software
10 # distributed under the License is distributed on an "AS IS" BASIS,
11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 # See the License for the specific language governing permissions and
13 # limitations under the License.
14 
15 import typing
16 
17 if typing.TYPE_CHECKING:
18     from google.cloud import bigquery
19 
20 
21 def create_job() -> "bigquery.QueryJob":
22 
23     # [START bigquery_create_job]
24     from google.cloud import bigquery
25 
26     # Construct a BigQuery client object.
27     client = bigquery.Client()
28 
29     query_job = client.query(
30         "SELECT country_name from `bigquery-public-data.utility_us.country_code_iso`",
31         # Explicitly force job execution to be routed to a specific processing
32         # location.
33         location="US",
34         # Specify a job configuration to set optional job resource properties.
35         job_config=bigquery.QueryJobConfig(
36             labels={"example-label": "example-value"}, maximum_bytes_billed=1000000
37         ),
38         # The client libraries automatically generate a job ID. Override the
39         # generated ID with either the job_id_prefix or job_id parameters.
40         job_id_prefix="code_sample_",
41     )  # Make an API request.
42 
43     print("Started job: {}".format(query_job.job_id))
44     # [END bigquery_create_job]
45     return query_job
46
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/samples/create_job.py b/samples/create_job.py
--- a/samples/create_job.py
+++ b/samples/create_job.py
@@ -13,12 +13,13 @@
 # limitations under the License.
 
 import typing
+from typing import Union
 
 if typing.TYPE_CHECKING:
-    from google.cloud import bigquery
+    from google.cloud.bigquery import LoadJob, CopyJob, ExtractJob, QueryJob
 
 
-def create_job() -> "bigquery.QueryJob":
+def create_job() -> "Union[LoadJob, CopyJob, ExtractJob, QueryJob]":
 
     # [START bigquery_create_job]
     from google.cloud import bigquery
@@ -26,20 +27,41 @@
     # Construct a BigQuery client object.
     client = bigquery.Client()
 
-    query_job = client.query(
-        "SELECT country_name from `bigquery-public-data.utility_us.country_code_iso`",
-        # Explicitly force job execution to be routed to a specific processing
-        # location.
-        location="US",
-        # Specify a job configuration to set optional job resource properties.
-        job_config=bigquery.QueryJobConfig(
-            labels={"example-label": "example-value"}, maximum_bytes_billed=1000000
-        ),
-        # The client libraries automatically generate a job ID. Override the
-        # generated ID with either the job_id_prefix or job_id parameters.
-        job_id_prefix="code_sample_",
+    query_job = client.create_job(
+        # Specify a job configuration, providing a query
+        # and/or optional job resource properties, as needed.
+        # The job instance can be a LoadJob, CopyJob, ExtractJob, QueryJob
+        # Here, we demonstrate a "query" job.
+        # References:
+        #     https://googleapis.dev/python/bigquery/latest/generated/google.cloud.bigquery.client.Client.html#google.cloud.bigquery.client.Client.create_job
+        #     https://cloud.google.com/bigquery/docs/reference/rest/v2/Job
+        #
+        # Example use cases for .create_job() include:
+        #    * to retry failed jobs
+        #    * to generate jobs with an experimental API property that hasn't
+        #      been added to one of the manually written job configuration
+        #      classes yet
+        #
+        # NOTE: unless it is necessary to create a job in this way, the
+        # preferred approach is to use one of the dedicated API calls:
+        #   client.query()
+        #   client.extract_table()
+        #   client.copy_table()
+        #   client.load_table_file(), client.load_table_from_dataframe(), etc
+        job_config={
+            "query": {
+                "query": """
+                         SELECT country_name
+                         FROM `bigquery-public-data.utility_us.country_code_iso`
+                         LIMIT 5
+                         """,
+            },
+            "labels": {"example-label": "example-value"},
+            "maximum_bytes_billed": 10000000,
+        }
     )  # Make an API request.
 
-    print("Started job: {}".format(query_job.job_id))
+    print(f"Started job: {query_job.job_id}")
     # [END bigquery_create_job]
+
     return query_job

{"golden_diff": "diff --git a/samples/create_job.py b/samples/create_job.py\n--- a/samples/create_job.py\n+++ b/samples/create_job.py\n@@ -13,12 +13,13 @@\n # limitations under the License.\n \n import typing\n+from typing import Union\n \n if typing.TYPE_CHECKING:\n-    from google.cloud import bigquery\n+    from google.cloud.bigquery import LoadJob, CopyJob, ExtractJob, QueryJob\n \n \n-def create_job() -> \"bigquery.QueryJob\":\n+def create_job() -> \"Union[LoadJob, CopyJob, ExtractJob, QueryJob]\":\n \n     # [START bigquery_create_job]\n     from google.cloud import bigquery\n@@ -26,20 +27,41 @@\n     # Construct a BigQuery client object.\n     client = bigquery.Client()\n \n-    query_job = client.query(\n-        \"SELECT country_name from `bigquery-public-data.utility_us.country_code_iso`\",\n-        # Explicitly force job execution to be routed to a specific processing\n-        # location.\n-        location=\"US\",\n-        # Specify a job configuration to set optional job resource properties.\n-        job_config=bigquery.QueryJobConfig(\n-            labels={\"example-label\": \"example-value\"}, maximum_bytes_billed=1000000\n-        ),\n-        # The client libraries automatically generate a job ID. Override the\n-        # generated ID with either the job_id_prefix or job_id parameters.\n-        job_id_prefix=\"code_sample_\",\n+    query_job = client.create_job(\n+        # Specify a job configuration, providing a query\n+        # and/or optional job resource properties, as needed.\n+        # The job instance can be a LoadJob, CopyJob, ExtractJob, QueryJob\n+        # Here, we demonstrate a \"query\" job.\n+        # References:\n+        #     https://googleapis.dev/python/bigquery/latest/generated/google.cloud.bigquery.client.Client.html#google.cloud.bigquery.client.Client.create_job\n+        #     https://cloud.google.com/bigquery/docs/reference/rest/v2/Job\n+        #\n+        # Example use cases for .create_job() include:\n+        #    * to retry failed jobs\n+        #    * to generate jobs with an experimental API property that hasn't\n+        #      been added to one of the manually written job configuration\n+        #      classes yet\n+        #\n+        # NOTE: unless it is necessary to create a job in this way, the\n+        # preferred approach is to use one of the dedicated API calls:\n+        #   client.query()\n+        #   client.extract_table()\n+        #   client.copy_table()\n+        #   client.load_table_file(), client.load_table_from_dataframe(), etc\n+        job_config={\n+            \"query\": {\n+                \"query\": \"\"\"\n+                         SELECT country_name\n+                         FROM `bigquery-public-data.utility_us.country_code_iso`\n+                         LIMIT 5\n+                         \"\"\",\n+            },\n+            \"labels\": {\"example-label\": \"example-value\"},\n+            \"maximum_bytes_billed\": 10000000,\n+        }\n     )  # Make an API request.\n \n-    print(\"Started job: {}\".format(query_job.job_id))\n+    print(f\"Started job: {query_job.job_id}\")\n     # [END bigquery_create_job]\n+\n     return query_job\n", "issue": "Python `bigquery_create_job` sample is inconsistent with other code samples\nThe https://github.com/googleapis/python-bigquery/blob/main/samples/create_job.py code sample appears here: https://cloud.google.com/bigquery/docs/running-jobs#running_jobs_using_client_libraries\r\n\r\nThis sample requires two improvements:\r\n\r\n* [ ] That section is about any kind of job, not just queries. As such, it should use the [create_job](https://googleapis.dev/python/bigquery/latest/generated/google.cloud.bigquery.client.Client.html#google.cloud.bigquery.client.Client.create_job) method instead of the more specific `query` method. There should be comments that it is recommended to use the corresponding method for query/copy/load/extract.\r\n* [ ] Remove `job_id_prefix` logic, as labels cover similar functionality and are recommended over custom job IDs.\r\n* [ ] Move the sample to the `samples/snippets` directory. Needs to be done in 2 separate PRs so that the existing samples in the docs don't 404.\n", "before_files": [{"content": "# Copyright 2019 Google LLC\n#\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n#\n#     https://www.apache.org/licenses/LICENSE-2.0\n#\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\n\nimport typing\n\nif typing.TYPE_CHECKING:\n    from google.cloud import bigquery\n\n\ndef create_job() -> \"bigquery.QueryJob\":\n\n    # [START bigquery_create_job]\n    from google.cloud import bigquery\n\n    # Construct a BigQuery client object.\n    client = bigquery.Client()\n\n    query_job = client.query(\n        \"SELECT country_name from `bigquery-public-data.utility_us.country_code_iso`\",\n        # Explicitly force job execution to be routed to a specific processing\n        # location.\n        location=\"US\",\n        # Specify a job configuration to set optional job resource properties.\n        job_config=bigquery.QueryJobConfig(\n            labels={\"example-label\": \"example-value\"}, maximum_bytes_billed=1000000\n        ),\n        # The client libraries automatically generate a job ID. Override the\n        # generated ID with either the job_id_prefix or job_id parameters.\n        job_id_prefix=\"code_sample_\",\n    )  # Make an API request.\n\n    print(\"Started job: {}\".format(query_job.job_id))\n    # [END bigquery_create_job]\n    return query_job\n", "path": "samples/create_job.py"}], "after_files": [{"content": "# Copyright 2019 Google LLC\n#\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n#\n#     https://www.apache.org/licenses/LICENSE-2.0\n#\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\n\nimport typing\nfrom typing import Union\n\nif typing.TYPE_CHECKING:\n    from google.cloud.bigquery import LoadJob, CopyJob, ExtractJob, QueryJob\n\n\ndef create_job() -> \"Union[LoadJob, CopyJob, ExtractJob, QueryJob]\":\n\n    # [START bigquery_create_job]\n    from google.cloud import bigquery\n\n    # Construct a BigQuery client object.\n    client = bigquery.Client()\n\n    query_job = client.create_job(\n        # Specify a job configuration, providing a query\n        # and/or optional job resource properties, as needed.\n        # The job instance can be a LoadJob, CopyJob, ExtractJob, QueryJob\n        # Here, we demonstrate a \"query\" job.\n        # References:\n        #     https://googleapis.dev/python/bigquery/latest/generated/google.cloud.bigquery.client.Client.html#google.cloud.bigquery.client.Client.create_job\n        #     https://cloud.google.com/bigquery/docs/reference/rest/v2/Job\n        #\n        # Example use cases for .create_job() include:\n        #    * to retry failed jobs\n        #    * to generate jobs with an experimental API property that hasn't\n        #      been added to one of the manually written job configuration\n        #      classes yet\n        #\n        # NOTE: unless it is necessary to create a job in this way, the\n        # preferred approach is to use one of the dedicated API calls:\n        #   client.query()\n        #   client.extract_table()\n        #   client.copy_table()\n        #   client.load_table_file(), client.load_table_from_dataframe(), etc\n        job_config={\n            \"query\": {\n                \"query\": \"\"\"\n                         SELECT country_name\n                         FROM `bigquery-public-data.utility_us.country_code_iso`\n                         LIMIT 5\n                         \"\"\",\n            },\n            \"labels\": {\"example-label\": \"example-value\"},\n            \"maximum_bytes_billed\": 10000000,\n        }\n    )  # Make an API request.\n\n    print(f\"Started job: {query_job.job_id}\")\n    # [END bigquery_create_job]\n\n    return query_job\n", "path": "samples/create_job.py"}]}