chore: Remove deprecated Python versions from CI

.github/workflows/ci_tests.yaml

@@ -9,46 +9,6 @@ on:
     - cron: '0 0 * * *'
 
 jobs:
-  # Hypothesis no longer supports Python 2 and
-  # there is a bug that appears with our slow tests
-  # only on Python 2.
-  # Until we also drop Python 2 support,
-  # the workaround is just that we don't run the slow tests
-  # on Python 2.
-  py2-tests:
-    runs-on: ${{ matrix.platform.os }}
-    strategy:
-      fail-fast: true
-      matrix:
-        platform:
-          - os: ubuntu-latest
-            architecture: x64
-          - os: windows-latest
-            architecture: x64
-          # x86 builds are only meaningful for Windows
-          - os: windows-latest
-            architecture: x86
-          - os: macos-latest
-            architecture: x64
-        category:
-          - local-fast
-    # These require credentials.
-    # Enable them once we sort how to provide them.
-    #          - integ-fast
-    #          - examples
-    steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-python@v2
-        with:
-          python-version: 2.7
-          architecture: ${{ matrix.platform.architecture }}
-      - run: |
-          python -m pip install --upgrade pip
-          pip install --upgrade -r ci-requirements.txt
-      - name: run test
-        env:
-          TOXENV: ${{ matrix.category }}
-        run: tox -- -vv
   tests:
     runs-on: ${{ matrix.platform.os }}
     strategy:
@@ -65,8 +25,6 @@ jobs:
           - os: macos-latest
             architecture: x64
         python:
-          - 3.5
-          - 3.6
           - 3.7
           - 3.8
           - 3.9
@@ -111,22 +69,3 @@ jobs:
         env:
           TOXENV: ${{ matrix.category }}
         run: tox -- -vv
-  upstream-py2:
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: true
-      matrix:
-        category:
-          - test-upstream-requirements-py27
-    steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-python@v1
-        with:
-          python-version: 2.7
-      - run: |
-          python -m pip install --upgrade pip
-          pip install --upgrade -r ci-requirements.txt
-      - name: run test
-        env:
-          TOXENV: ${{ matrix.category }}
-        run: tox -- -vv

buildspec.yml

@@ -3,12 +3,6 @@ version: 0.2
 batch:
   fast-fail: false
   build-list:
-    - identifier: python2_7
-      buildspec: codebuild/python2.7.yml
-    - identifier: python3_5
-      buildspec: codebuild/python3.5.yml
-    - identifier: python3_6
-      buildspec: codebuild/python3.6.yml
     - identifier: python3_7
       buildspec: codebuild/python3.7.yml
     - identifier: python3_8

dev_requirements/linter-requirements.txt

@@ -1,16 +1,16 @@
-bandit==1.7.0
-black==21.12b0
+bandit==1.7.2
+black==22.3.0
 doc8==0.10.1
 flake8==4.0.1
-flake8-bugbear==21.11.29
 flake8-docstrings==1.6.0
 flake8-isort==4.1.1
+# https://github.com/JBKahn/flake8-print/pull/30
 flake8-print==4.0.0
 isort==5.10.1
-pydocstyle==3.0.0
-pyflakes==2.4.0
 pylint==2.12.2
-readme_renderer==32.0
+pyflakes==2.4.0
+# https://github.com/PyCQA/pydocstyle/issues/375
+pydocstyle==3.0.0
+readme_renderer==34.0
 seed-isort-config==2.2.0
 vulture==2.3
-sphinx==4.4.0

doc/conf.py

@@ -29,7 +29,7 @@ def get_version():
     return _release
 
 
-project = u"dynamodb-encryption-sdk-python"  # pylint: disable=redundant-u-string-prefix
+project = "dynamodb-encryption-sdk-python"
 version = get_version()
 release = get_release()
 
@@ -53,7 +53,7 @@ def get_version():
 source_suffix = ".rst"  # The suffix of source filenames.
 master_doc = "index"  # The master toctree document.
 
-copyright = u"%s, Amazon" % datetime.now().year  # pylint: disable=redefined-builtin,redundant-u-string-prefix
+copyright = "%s, Amazon" % datetime.now().year  # pylint: disable=redefined-builtin
 
 # List of directories, relative to source directory, that shouldn't be searched
 # for source files.

examples/src/pylintrc

@@ -3,6 +3,7 @@
 disable =
     duplicate-code,  # these examples often feature similar code
     too-many-locals,  # for these examples, we prioritize keeping everything together for simple readability
+    consider-using-f-string, # Not supported in Python 3.5
 
 [BASIC]
 # Allow function names up to 50 characters

examples/test/examples_test_utils.py

@@ -5,4 +5,9 @@
 os.environ["AWS_ENCRYPTION_SDK_EXAMPLES_TESTING"] = "yes"
 sys.path.extend([os.sep.join([os.path.dirname(__file__), "..", "..", "test", "integration"])])
 
-from integration_test_utils import cmk_arn, cmk_mrk_arn, ddb_table_name, second_cmk_mrk_arn  # noqa pylint: disable=unused-import
+from integration_test_utils import (  # noqa pylint: disable=unused-import
+    cmk_arn,
+    cmk_mrk_arn,
+    ddb_table_name,
+    second_cmk_mrk_arn,
+)

examples/test/test_aws_kms_encrypted_examples.py

@@ -20,7 +20,12 @@
     aws_kms_multi_region_key,
 )
 
-from .examples_test_utils import cmk_arn, cmk_mrk_arn, ddb_table_name, second_cmk_mrk_arn  # noqa pylint: disable=unused-import
+from .examples_test_utils import (  # noqa pylint: disable=unused-import
+    cmk_arn,
+    cmk_mrk_arn,
+    ddb_table_name,
+    second_cmk_mrk_arn,
+)
 
 pytestmark = [pytest.mark.examples]
 

src/dynamodb_encryption_sdk/material_providers/most_recent.py

@@ -35,9 +35,7 @@
     pass
 
 
-__all__ = (
-    "CachingMostRecentProvider",
-)
+__all__ = ("CachingMostRecentProvider",)
 _LOGGER = logging.getLogger(LOGGER_NAME)
 #: Grace period during which we will return the latest local materials. This allows multiple
 #: threads to be using this same provider without risking lock contention or many threads

src/pylintrc

@@ -1,14 +1,13 @@
 [MESSAGES CONTROL]
 # Disabling messages that we either don't care about for tests or are necessary to break for tests.
 disable =
-    bad-continuation,  # we let black handle this
     ungrouped-imports,  # we let isort handle this
     duplicate-code,  # causes lots of problems with implementations of common interfaces
     # All below are disabled because we need to support Python 2
     useless-object-inheritance,
     raise-missing-from,
     super-with-arguments,
-    consider-using-f-string
+    consider-using-f-string,
 
 [BASIC]
 # Allow function names up to 50 characters

test/acceptance/acceptance_test_generators.py

@@ -43,7 +43,7 @@ def load_scenarios(online):
     into a shared method.
     """
     # pylint: disable=too-many-locals
-    with open(_SCENARIO_FILE) as f:
+    with open(_SCENARIO_FILE, encoding="utf-8") as f:
         scenarios = json.load(f)
     keys_file = _filename_from_uri(scenarios["keys"])
     keys = _load_keys(keys_file)
@@ -128,7 +128,7 @@ def _generate(materials_provider, table_data, ciphertext_file, metastore_info):
             if table:
                 table.delete()
 
-    with open(ciphertext_file, "w") as outfile:
+    with open(ciphertext_file, "w", encoding="utf-8") as outfile:
         json.dump(data_table_output, outfile, indent=4)
 
     if metatable:
@@ -137,7 +137,7 @@ def _generate(materials_provider, table_data, ciphertext_file, metastore_info):
         metastore_output[metastore_info["table_name"]].append(ddb_to_json(wrapping_key))
 
         metastore_ciphertext_file = _filename_from_uri(metastore_info["ciphertext"])
-        with open(metastore_ciphertext_file, "w") as outfile:
+        with open(metastore_ciphertext_file, "w", encoding="utf-8") as outfile:
             json.dump(metastore_output, outfile, indent=4)
 
         metatable.delete()

test/acceptance/acceptance_test_utils.py

@@ -61,7 +61,7 @@ def _decode_item(item):
 
 def _build_plaintext_items(plaintext_file, version):
     # pylint: disable=too-many-locals
-    with open(plaintext_file) as f:
+    with open(plaintext_file, encoding="utf-8") as f:
         plaintext_data = json.load(f)
 
     actions = {}
@@ -92,7 +92,7 @@ def _build_plaintext_items(plaintext_file, version):
 
 
 def _load_ciphertext_items(ciphertext_file):
-    with open(ciphertext_file) as f:
+    with open(ciphertext_file, encoding="utf-8") as f:
         ciphertexts = json.load(f)
 
     for _table, items in ciphertexts.items():
@@ -103,7 +103,7 @@ def _load_ciphertext_items(ciphertext_file):
 
 
 def _load_keys(keys_file):
-    with open(keys_file) as f:
+    with open(keys_file, encoding="utf-8") as f:
         return json.load(f)
 
 
@@ -165,7 +165,7 @@ def _meta_table_prep(table_name, items_filename):
     table = boto3.resource("dynamodb", region_name="us-west-2").Table(table_name)
     table.wait_until_exists()
     try:
-        with open(_filename_from_uri(items_filename)) as f:
+        with open(_filename_from_uri(items_filename), encoding="utf-8") as f:
             table_data = json.load(f)
         request_items = {}
 
@@ -255,7 +255,7 @@ def _expand_items(ciphertext_items, plaintext_items):
 
 def load_scenarios(online):
     # pylint: disable=too-many-locals
-    with open(_SCENARIO_FILE) as f:
+    with open(_SCENARIO_FILE, encoding="utf-8") as f:
         scenarios = json.load(f)
     keys_file = _filename_from_uri(scenarios["keys"])
     keys = _load_keys(keys_file)

test/functional/functional_test_vector_generators.py

@@ -104,14 +104,14 @@ def _decode_complex_value(_value):
 
 def attribute_test_vectors(mode):
     filepath = _ATTRIBUTE_TEST_VECTOR_FILE_TEMPLATE.format(mode=mode)
-    with open(filepath) as f:
+    with open(filepath, encoding="utf-8") as f:
         vectors = json.load(f)
     for vector in vectors:
         yield (decode_value(vector["attribute"]), base64.b64decode(codecs.encode(vector["serialized"], "utf-8")))
 
 
 def material_description_test_vectors():
-    with open(_MATERIAL_DESCRIPTION_TEST_VECTORS_FILE) as f:
+    with open(_MATERIAL_DESCRIPTION_TEST_VECTORS_FILE, encoding="utf-8") as f:
         vectors = json.load(f)
     for vector in vectors:
         yield (vector["material_description"], decode_value({"B": codecs.encode(vector["serialized"], "utf-8")}))
@@ -125,7 +125,7 @@ def material_description_test_vectors():
 
 
 def string_to_sign_test_vectors():
-    with open(_STRING_TO_SIGN_TEST_VECTORS_FILE) as f:
+    with open(_STRING_TO_SIGN_TEST_VECTORS_FILE, encoding="utf-8") as f:
         vectors = json.load(f)
     for vector in vectors:
         item = {key: decode_value(value["value"]) for key, value in vector["item"].items()}

test/functional/hypothesis_strategies.py

@@ -23,6 +23,7 @@
         hypothesis.HealthCheck.too_slow,
         hypothesis.HealthCheck.data_too_large,
         hypothesis.HealthCheck.large_base_example,
+        hypothesis.HealthCheck.function_scoped_fixture,
     ),
     deadline=None,
 )

test/functional/internal/test_str_ops.py

@@ -26,8 +26,8 @@
     (
         ("asdf", "asdf"),
         (b"asdf", "asdf"),
-        (codecs.encode(u"Предисловие", "utf-8"), u"Предисловие"),
-        (u"Предисловие", u"Предисловие"),
+        (codecs.encode("Предисловие", "utf-8"), "Предисловие"),
+        ("Предисловие", "Предисловие"),
     ),
 )
 def test_to_str(data, expected_output):
@@ -41,8 +41,8 @@ def test_to_str(data, expected_output):
         ("asdf", b"asdf"),
         (b"asdf", b"asdf"),
         (b"\x3a\x00\x99", b"\x3a\x00\x99"),
-        (u"Предисловие", codecs.encode(u"Предисловие", "utf-8")),
-        (codecs.encode(u"Предисловие", "utf-8"), codecs.encode(u"Предисловие", "utf-8")),
+        ("Предисловие", codecs.encode("Предисловие", "utf-8")),
+        (codecs.encode("Предисловие", "utf-8"), codecs.encode("Предисловие", "utf-8")),
     ),
 )
 def test_to_bytes(data, expected_output):