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How to use bucket_exists method in localstack
Best Python code snippet using localstack_python
it_object_store_dataset_manager.py
Source:it_object_store_dataset_manager.py 
...84 """ Test that a simple data add creates a new object as expected. """85 ex_num = 186 dataset_name = self.examples[ex_num]['name']87 dest_object_name = 'data_file'88 self.assertFalse(self.minio_client.bucket_exists(dataset_name))89 self.manager.create(**self.examples[ex_num])90 does_exist = self.minio_client.bucket_exists(dataset_name)91 if does_exist:92 self._datasets_to_cleanup.add(dataset_name)93 self.assertNotIn(dest_object_name, self.manager.list_files(dataset_name))94 original_data = "File data contents"95 result = self.manager.add_data(dataset_name=dataset_name, dest=dest_object_name, data=original_data.encode())96 self.assertTrue(result)97 self.assertIn(dest_object_name, self.manager.list_files(dataset_name))98 def test_add_data_1_b(self):99 """ Test that a simple data add of raw data works correctly. """100 ex_num = 1101 dataset_name = self.examples[ex_num]['name']102 dest_object_name = 'data_file'103 self.assertFalse(self.minio_client.bucket_exists(dataset_name))104 self.manager.create(**self.examples[ex_num])105 does_exist = self.minio_client.bucket_exists(dataset_name)106 if does_exist:107 self._datasets_to_cleanup.add(dataset_name)108 original_data = "File data contents"109 self.manager.add_data(dataset_name=dataset_name, dest=dest_object_name, data=original_data.encode())110 raw_read_data = self.manager.get_data(dataset_name, item_name=dest_object_name)111 read_data = raw_read_data.decode()112 self.assertEqual(original_data, read_data)113 def test_add_data_1_c(self):114 """ Test that a data add of a file works correctly with specified dest. """115 ex_num = 1116 dataset_name = self.examples[ex_num]['name']117 file_to_add = Path(self.find_git_root_dir()).joinpath('doc/GIT_USAGE.md')118 expected_name = 'GIT_USAGE.md'119 self.assertTrue(file_to_add.is_file())120 expected_data = file_to_add.read_bytes()121 self.assertFalse(self.minio_client.bucket_exists(dataset_name))122 self.manager.create(**self.examples[ex_num])123 does_exist = self.minio_client.bucket_exists(dataset_name)124 if does_exist:125 self._datasets_to_cleanup.add(dataset_name)126 self.manager.add_data(dataset_name=dataset_name, dest=expected_name, source=str(file_to_add))127 raw_read_data = self.manager.get_data(dataset_name, item_name=expected_name)128 self.assertEqual(expected_data, raw_read_data)129 def test_add_data_1_d(self):130 """ Test that a data add of a directory of files works correctly with implied bucket root. """131 ex_num = 1132 dataset_name = self.examples[ex_num]['name']133 dir_to_add = Path(self.find_git_root_dir()).joinpath('doc')134 # Note that if the project's doc dir is altered in certain ways, this may have to be manually updated135 self.assertTrue(dir_to_add.is_dir())136 one_files_name = 'GIT_USAGE.md'137 one_file = dir_to_add.joinpath(one_files_name)138 one_files_expected_data = one_file.read_bytes()139 num_uploaded_files = 0140 for p in dir_to_add.iterdir():141 if p.is_file():142 num_uploaded_files += 1143 # This is actually one more, because of the serialized dataset state file144 expected_num_files = num_uploaded_files + 1145 self.assertFalse(self.minio_client.bucket_exists(dataset_name))146 self.manager.create(**self.examples[ex_num])147 does_exist = self.minio_client.bucket_exists(dataset_name)148 if does_exist:149 self._datasets_to_cleanup.add(dataset_name)150 self.manager.add_data(dataset_name=dataset_name, dest='', source=str(dir_to_add))151 actual_num_files = len(self.manager.list_files(dataset_name))152 self.assertEqual(expected_num_files, actual_num_files)153 raw_read_data = self.manager.get_data(dataset_name, item_name=one_files_name)154 self.assertEqual(one_files_expected_data, raw_read_data)155 def test_create_1_a(self):156 """157 Test that create works for a dataset that does not already exist.158 """159 ex_num = 1160 dataset_name = self.examples[ex_num]['name']161 self.assertFalse(self.minio_client.bucket_exists(dataset_name))162 self.manager.create(**self.examples[ex_num])163 does_exist = self.minio_client.bucket_exists(dataset_name)164 if does_exist:165 self._datasets_to_cleanup.add(dataset_name)166 self.assertTrue(does_exist)167 def test_create_1_b(self):168 """169 Test that create writes the state serialization file to the newly created dataset.170 """171 ex_num = 1172 dataset_name = self.examples[ex_num]['name']173 serial_file_name = self.manager._gen_dataset_serial_obj_name(dataset_name)174 self.assertFalse(self.minio_client.bucket_exists(dataset_name))175 self.manager.create(**self.examples[ex_num])176 does_exist = self.minio_client.bucket_exists(dataset_name)177 if does_exist:178 self._datasets_to_cleanup.add(dataset_name)179 result = self.minio_client.get_object(bucket_name=dataset_name, object_name=serial_file_name)180 self.assertIsNotNone(result)181 def test_get_data_1_a(self):182 """ Test that we can get the serialized file for a newly created dataset. """183 ex_num = 1184 dataset_name = self.examples[ex_num]['name']185 serial_file_name = self.manager._gen_dataset_serial_obj_name(dataset_name)186 self.assertFalse(self.minio_client.bucket_exists(dataset_name))187 self.manager.create(**self.examples[ex_num])188 does_exist = self.minio_client.bucket_exists(dataset_name)189 if does_exist:190 self._datasets_to_cleanup.add(dataset_name)191 data = self.manager.get_data(dataset_name, item_name=serial_file_name)192 self.assertIsInstance(data, bytes)193 def test_get_data_1_b(self):194 """ Test that we can get the serialized file for a newly created dataset, and that it decodes. """195 ex_num = 1196 dataset_name = self.examples[ex_num]['name']197 serial_file_name = self.manager._gen_dataset_serial_obj_name(dataset_name)198 self.assertFalse(self.minio_client.bucket_exists(dataset_name))199 self.manager.create(**self.examples[ex_num])200 does_exist = self.minio_client.bucket_exists(dataset_name)201 if does_exist:202 self._datasets_to_cleanup.add(dataset_name)203 data_dict = json.loads(self.manager.get_data(dataset_name, item_name=serial_file_name).decode())204 self.assertEqual(dataset_name, data_dict[ObjectStoreDataset._KEY_NAME])205 def test_list_files_1_a(self):206 """207 Test that list files includes the serialized file for a newly created dataset.208 """209 ex_num = 1210 dataset_name = self.examples[ex_num]['name']211 serial_file_name = self.manager._gen_dataset_serial_obj_name(dataset_name)212 self.assertFalse(self.minio_client.bucket_exists(dataset_name))213 self.manager.create(**self.examples[ex_num])214 does_exist = self.minio_client.bucket_exists(dataset_name)215 if does_exist:216 self._datasets_to_cleanup.add(dataset_name)217 self.assertTrue(serial_file_name in self.manager.list_files(dataset_name))218 def test_persist_serialized_1_a(self):219 """220 Test that serialized persistence works for new dataset after an extra, manual persist call.221 """222 ex_num = 1223 dataset_name = self.examples[ex_num]['name']224 self.assertFalse(self.minio_client.bucket_exists(dataset_name))225 self.manager.create(**self.examples[ex_num])226 does_exist = self.minio_client.bucket_exists(dataset_name)227 if does_exist:228 self._datasets_to_cleanup.add(dataset_name)229 self.manager.persist_serialized(name=dataset_name)230 expected_obj_name = self.manager._gen_dataset_serial_obj_name(dataset_name)231 result = self.minio_client.get_object(bucket_name=dataset_name, object_name=expected_obj_name)232 self.assertIsNotNone(result)233 def test_persist_serialized_1_b(self):234 """235 Test that ``persist_serialized`` (during create) writes a serialization file that can be deserialized properly.236 """237 ex_num = 1238 dataset_name = self.examples[ex_num]['name']239 serial_file_name = self.manager._gen_dataset_serial_obj_name(dataset_name)240 self.assertFalse(self.minio_client.bucket_exists(dataset_name))241 self.manager.create(**self.examples[ex_num])242 does_exist = self.minio_client.bucket_exists(dataset_name)243 if does_exist:244 self._datasets_to_cleanup.add(dataset_name)245 data_dict = json.loads(self.manager.get_data(dataset_name, item_name=serial_file_name).decode())246 dataset = ObjectStoreDataset.factory_init_from_deserialized_json(data_dict)247 expected_dataset = self.manager.datasets[dataset_name]248 self.assertEqual(expected_dataset, dataset)249 def test_persist_serialized_1_c(self):250 """251 Test that serialized persistence works for new dataset and correctly saves dataset domain.252 """253 ex_num = 1254 dataset_name = self.examples[ex_num]['name']255 self.assertFalse(self.minio_client.bucket_exists(dataset_name))256 self.manager.create(**self.examples[ex_num])257 does_exist = self.minio_client.bucket_exists(dataset_name)258 if does_exist:259 self._datasets_to_cleanup.add(dataset_name)260 serial_dataset_obj_name = self.manager._gen_dataset_serial_obj_name(dataset_name)261 response_obj = self.minio_client.get_object(bucket_name=dataset_name, object_name=serial_dataset_obj_name)262 response_data = json.loads(response_obj.data.decode())263 expected_domain = self.examples[ex_num]['domain']264 serialized_domain = DataDomain.factory_init_from_deserialized_json(response_data['data_domain'])265 self.assertEqual(expected_domain, serialized_domain)266 def test_persist_serialized_1_d(self):267 """268 Test that serialized persistence works for new dataset and correctly saves several other dataset attributes.269 """270 ex_num = 1271 dataset_name = self.examples[ex_num]['name']272 self.assertFalse(self.minio_client.bucket_exists(dataset_name))273 self.manager.create(**self.examples[ex_num])274 does_exist = self.minio_client.bucket_exists(dataset_name)275 if does_exist:276 self._datasets_to_cleanup.add(dataset_name)277 expected_dataset = self.manager.datasets[dataset_name]278 serial_dataset_obj_name = self.manager._gen_dataset_serial_obj_name(dataset_name)279 response_obj = self.minio_client.get_object(bucket_name=dataset_name, object_name=serial_dataset_obj_name)280 response_data = json.loads(response_obj.data.decode())281 deserialized_dataset = ObjectStoreDataset.factory_init_from_deserialized_json(response_data)282 self.assertEqual(expected_dataset, deserialized_dataset)283 def test_persist_serialized_1_e(self):284 """285 Test that create writes a state serialization file that is loaded properly by a new manager instance.286 """287 ex_num = 1288 dataset_name = self.examples[ex_num]['name']289 self.assertFalse(self.minio_client.bucket_exists(dataset_name))290 self.manager.create(**self.examples[ex_num])291 does_exist = self.minio_client.bucket_exists(dataset_name)292 if does_exist:293 self._datasets_to_cleanup.add(dataset_name)294 self._initialize_manager(reset_existing=True)295 self.assertIn(dataset_name, self.manager.datasets)296 def test_persist_serialized_1_f(self):297 """298 Test that create writes a state serialization file that is loaded properly by a new manager instance.299 """300 ex_num = 1301 dataset_name = self.examples[ex_num]['name']302 self.assertFalse(self.minio_client.bucket_exists(dataset_name))303 self.manager.create(**self.examples[ex_num])304 does_exist = self.minio_client.bucket_exists(dataset_name)305 if does_exist:306 self._datasets_to_cleanup.add(dataset_name)307 expected_dataset = self.manager.datasets[dataset_name]308 self._initialize_manager(reset_existing=True)309 dataset = self.manager.datasets[dataset_name]310 self.assertEqual(expected_dataset, dataset)311 def test_persist_serialized_1_g(self):312 """313 Test that create writes a state serialization file that is loaded properly by a new manager instance.314 """315 ex_num = 1316 dataset_name = self.examples[ex_num]['name']317 serial_file_name = self.manager._gen_dataset_serial_obj_name(dataset_name)318 self.assertFalse(self.minio_client.bucket_exists(dataset_name))319 self.manager.create(**self.examples[ex_num])320 does_exist = self.minio_client.bucket_exists(dataset_name)321 if does_exist:322 self._datasets_to_cleanup.add(dataset_name)323 # Get the initial data from the serial file324 expected_data = self.manager.get_data(dataset_name, item_name=serial_file_name)325 # Create a new manager object, which should reload the dataset from the bucket and serial file326 self._initialize_manager(reset_existing=True)327 # Now load the data from the new manager328 DataFormat.NGEN_GEOJSON_HYDROFABRIC329 data = self.manager.get_data(dataset_name, item_name=serial_file_name)330 self.assertEqual(expected_data, data)331 def test_datasets_1_a(self):332 """333 Test that ``datasets`` property does not initially have testing dataset.334 """335 ex_num = 1336 dataset_name = self.examples[ex_num]['name']337 self.assertFalse(self.minio_client.bucket_exists(dataset_name))338 self.assertFalse(dataset_name in self.manager.datasets)339 def test_datasets_1_b(self):340 """341 Test that ``datasets`` property shows dataset after it is created.342 """343 ex_num = 1344 dataset_name = self.examples[ex_num]['name']345 self.assertFalse(self.minio_client.bucket_exists(dataset_name))346 all_datasets = self.manager.datasets347 self.assertFalse(dataset_name in self.manager.datasets)348 self.manager.create(**self.examples[ex_num])349 does_exist = self.minio_client.bucket_exists(dataset_name)350 if does_exist:351 self._datasets_to_cleanup.add(dataset_name)352 self.assertTrue(dataset_name in self.manager.datasets)353 def test_datasets_1_c(self):354 """355 Test that ``datasets`` property store actual dataset object of correct type after it is created.356 """357 ex_num = 1358 dataset_name = self.examples[ex_num]['name']359 self.assertFalse(self.minio_client.bucket_exists(dataset_name))360 self.assertFalse(dataset_name in self.manager.datasets)361 self.manager.create(**self.examples[ex_num])362 does_exist = self.minio_client.bucket_exists(dataset_name)363 if does_exist:364 self._datasets_to_cleanup.add(dataset_name)365 self.assertIsInstance(self.manager.datasets[dataset_name], ObjectStoreDataset)366 def test_datasets_1_d(self):367 """368 Test that ``datasets`` property store actual dataset object after it is created.369 """370 ex_num = 1371 dataset_name = self.examples[ex_num]['name']372 self.assertFalse(self.minio_client.bucket_exists(dataset_name))373 self.assertFalse(dataset_name in self.manager.datasets)374 self.manager.create(**self.examples[ex_num])375 does_exist = self.minio_client.bucket_exists(dataset_name)376 if does_exist:377 self._datasets_to_cleanup.add(dataset_name)378 self.assertEqual(self.manager.datasets[dataset_name].name, dataset_name)...
test_gcloud.py
Source:test_gcloud.py
1# Copyright 2020 Neal Lathia2#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 at6#7# http://www.apache.org/licenses/LICENSE-2.08#9# Unless required by applicable law or agreed to in writing, software10# 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 and13# limitations under the License.14import os15import mock16import pytest17from google.cloud import storage18from google.cloud.storage.blob import Blob19from modelstore.metadata import metadata20from modelstore.storage.gcloud import GoogleCloudStorage21# pylint: disable=unused-import22from tests.storage.test_utils import (23 TEST_FILE_CONTENTS,24 TEST_FILE_NAME,25 remote_file_path,26 temp_file,27)28# pylint: disable=redefined-outer-name29# pylint: disable=protected-access30# pylint: disable=missing-function-docstring31_MOCK_BUCKET_NAME = "gcloud-bucket"32_MOCK_PROJECT_NAME = "project-name"33def gcloud_bucket(bucket_exists: bool):34 mock_bucket = mock.create_autospec(storage.Bucket)35 mock_bucket.name = _MOCK_BUCKET_NAME36 mock_bucket.exists.return_value = bucket_exists37 return mock_bucket38def gcloud_blob(blob_exists: bool, file_contents: str):39 mock_blob = mock.create_autospec(storage.Blob)40 mock_blob.exists.return_value = blob_exists41 if blob_exists:42 mock_blob.download_as_string.return_value = file_contents43 return mock_blob44def gcloud_anon_client(bucket_exists: bool, blob_exists: bool, file_contents: str):45 # Create a storage client46 mock_client = mock.create_autospec(storage.Client)47 # Add a bucket to the client; anonymous clients use .bucket48 # instead of .get_bucket49 mock_bucket = gcloud_bucket(bucket_exists)50 mock_client.bucket.return_value = mock_bucket51 # If the bucket exists, add a file to it52 if bucket_exists:53 mock_blob = gcloud_blob(blob_exists, file_contents)54 mock_bucket.blob.return_value = mock_blob55 if blob_exists:56 # The anonymous client can list the blobs57 mock_client.list_blobs.return_value = [mock_blob]58 return mock_client59def gcloud_authed_client(bucket_exists: bool, blob_exists: bool, file_contents: str):60 # Create a storage client61 mock_client = mock.create_autospec(storage.Client)62 # Add a bucket to the client63 mock_bucket = gcloud_bucket(bucket_exists)64 mock_client.get_bucket.return_value = mock_bucket65 # If the bucket exists, add a file to it66 if bucket_exists:67 mock_blob = gcloud_blob(blob_exists, file_contents)68 mock_bucket.blob.return_value = mock_blob69 return mock_client70def gcloud_storage(mock_client: storage.Client, is_anon_client: bool):71 return GoogleCloudStorage(72 project_name=_MOCK_PROJECT_NAME,73 bucket_name=_MOCK_BUCKET_NAME,74 client=mock_client,75 is_anon_client=is_anon_client,76 )77def gcloud_client(bucket_exists: bool, blob_exists: bool, is_anon_client: bool, file_contents: str = TEST_FILE_CONTENTS):78 if is_anon_client:79 client = gcloud_anon_client(bucket_exists, blob_exists, file_contents)80 return client, gcloud_storage(client, is_anon_client)81 else:82 client = gcloud_authed_client(bucket_exists, blob_exists, file_contents)83 return client, gcloud_storage(client, is_anon_client)84def test_create_from_environment_variables(monkeypatch):85 monkeypatch.setenv("MODEL_STORE_GCP_PROJECT", _MOCK_PROJECT_NAME)86 monkeypatch.setenv("MODEL_STORE_GCP_BUCKET", _MOCK_BUCKET_NAME)87 # Does not fail when environment variables exist88 # pylint: disable=bare-except89 try:90 _ = GoogleCloudStorage()91 except:92 pytest.fail("Failed to initialise storage from env variables")93def test_create_fails_with_missing_environment_variables(monkeypatch):94 # Fails when environment variables are missing95 for key in GoogleCloudStorage.BUILD_FROM_ENVIRONMENT.get("required", []):96 monkeypatch.delenv(key, raising=False)97 with pytest.raises(KeyError):98 _ = GoogleCloudStorage()99@pytest.mark.parametrize(100 "bucket_exists,is_anon_client,validate_should_pass",101 [102 (False, False, False),103 (True, False, True),104 (False, True, False),105 (True, True, True),106 ],107)108def test_validate(bucket_exists, is_anon_client, validate_should_pass):109 _, storage = gcloud_client(110 bucket_exists=bucket_exists,111 blob_exists=False,112 is_anon_client=is_anon_client113 )114 assert storage.validate() == validate_should_pass115def test_push(tmp_path):116 _, storage = gcloud_client(117 bucket_exists=True,118 blob_exists=False,119 is_anon_client=False120 )121 # Push a file122 prefix = remote_file_path()123 result = storage._push(temp_file(tmp_path), prefix)124 # Assert that the correct prefix is returned125 # and that an upload happened126 assert result == prefix127 # Assert that an upload happened128 mock_bucket = storage.client.get_bucket(storage.bucket_name)129 mock_blob = mock_bucket.blob(prefix)130 mock_blob.upload_from_file.assert_called()131def test_anonymous_push(tmp_path):132 _, storage = gcloud_client(133 bucket_exists=True,134 blob_exists=False,135 is_anon_client=True136 )137 prefix = remote_file_path()138 with pytest.raises(NotImplementedError):139 _ = storage._push(temp_file(tmp_path), prefix)140def test_pull(tmp_path):141 _, storage = gcloud_client(142 bucket_exists=True,143 blob_exists=True,144 is_anon_client=False145 )146 # Pull the file back from storage147 prefix = remote_file_path()148 result = storage._pull(prefix, tmp_path)149 # Assert returned path150 local_destination = os.path.join(tmp_path, TEST_FILE_NAME)151 assert result == local_destination152 # Assert download happened153 mock_bucket = storage.client.get_bucket(storage.bucket_name)154 mock_blob = mock_bucket.blob(prefix)155 mock_blob.download_to_filename.assert_called_with(local_destination)156def test_anonymous_pull(tmp_path):157 _, storage = gcloud_client(158 bucket_exists=True,159 blob_exists=True,160 is_anon_client=True161 )162 # Pull the file back from storage163 prefix = remote_file_path()164 result = storage._pull(prefix, tmp_path)165 # Assert returned path166 local_destination = os.path.join(tmp_path, TEST_FILE_NAME)167 assert result == local_destination168 # Assert download happened169 mock_bucket = storage.client.bucket(storage.bucket_name)170 mock_blob = mock_bucket.blob(prefix)171 mock_blob.download_to_filename.assert_called_with(local_destination)172@pytest.mark.parametrize(173 "blob_exists,should_call_delete",174 [175 (False, False),176 (True, True),177 ],178)179def test_remove(blob_exists, should_call_delete):180 mock_client, storage = gcloud_client(181 bucket_exists=True,182 blob_exists=blob_exists,183 is_anon_client=False184 )185 prefix = remote_file_path()186 mock_bucket = mock_client.get_bucket(storage.bucket_name)187 mock_blob = mock_bucket.blob(prefix)188 file_removed = storage._remove(prefix)189 assert file_removed == should_call_delete190 if should_call_delete:191 # Asserts that removing the file results in a removal192 mock_blob.delete.assert_called()193 else:194 # Asserts that we don't call delete on a file that doesn't exist195 mock_blob.delete.assert_not_called()196def test_anonymous_remove():197 _, storage = gcloud_client(198 bucket_exists=True,199 blob_exists=True,200 is_anon_client=True201 )202 prefix = remote_file_path()203 with pytest.raises(NotImplementedError):204 _ = storage._remove(prefix)205def test_read_json_objects_ignores_non_json():206 mock_client, storage = gcloud_client(207 bucket_exists=True,208 blob_exists=False,209 is_anon_client=False210 )211 mock_client.list_blobs.return_value = [212 Blob(name="test-file-source-1.txt", bucket=_MOCK_BUCKET_NAME),213 Blob(name="test-file-source-2.txt", bucket=_MOCK_BUCKET_NAME),214 ]215 items = storage._read_json_objects("")216 assert len(items) == 0217def test_read_json_object_fails_gracefully():218 _, storage = gcloud_client(219 bucket_exists=True,220 blob_exists=True,221 is_anon_client=False,222 file_contents="not json"223 )224 prefix = remote_file_path()225 # Read a file that does not contain any JSON226 # Argument (remote prefix) is ignored here because of mock above227 item = storage._read_json_object(prefix)228 assert item is None229def test_storage_location():230 _, storage = gcloud_client(231 bucket_exists=False,232 blob_exists=False,233 is_anon_client=False234 )235 # Asserts that the location meta data is correctly formatted236 prefix = remote_file_path()237 expected = metadata.Storage.from_bucket(238 storage_type="google:cloud-storage",239 bucket=_MOCK_BUCKET_NAME,240 prefix=prefix,241 )242 assert storage._storage_location(prefix) == expected243@pytest.mark.parametrize(244 "meta_data,should_raise,result",245 [246 (247 metadata.Storage(248 type=None,249 path=None,250 bucket=_MOCK_BUCKET_NAME,251 container=None,252 prefix="/path/to/file"253 ),254 False,255 "/path/to/file",256 ),257 (258 metadata.Storage(259 type=None,260 path=None,261 bucket="a-different-bucket",262 container=None,263 prefix="/path/to/file"264 ),265 True,266 None,267 ),268 ],269)270def test_get_location(meta_data, should_raise, result):271 _, storage = gcloud_client(272 bucket_exists=False,273 blob_exists=False,274 is_anon_client=False275 )276 # Asserts that pulling the location out of meta data is correct277 if should_raise:278 with pytest.raises(ValueError):279 storage._get_storage_location(meta_data)280 else:...
bucket_exists.py
Source:bucket_exists.py
...22# language governing permissions and limitations under the License.23import logging24import boto325from botocore.exceptions import ClientError26def bucket_exists(bucket_name):27 """Determine whether bucket_name exists and the user has permission to access it28 :param bucket_name: string29 :return: True if the referenced bucket_name exists, otherwise False30 """31 s3 = boto3.client('s3')32 try:33 response = s3.head_bucket(Bucket=bucket_name)34 except ClientError as e:35 logging.debug(e)36 return False37 return True38def main():39 """Exercise bucket_exists()"""40 # Assign this value before running the program41 test_bucket_name = 'BUCKET_NAME'42 # Set up logging43 logging.basicConfig(level=logging.DEBUG,44 format='%(levelname)s: %(asctime)s: %(message)s')45 # Check if the bucket exists46 if bucket_exists(test_bucket_name):47 logging.info(f'{test_bucket_name} exists and you have permission to access it.')48 else:49 logging.info(f'{test_bucket_name} does not exist or '50 f'you do not have permission to access it.')51if __name__ == '__main__':...
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