Remove Python 3.8 Support

.github/containers/Dockerfile

@@ -115,7 +115,7 @@ RUN mv "${HOME}/.local/bin/python3.11" "${HOME}/.local/bin/pypy3.11" && \
     mv "${HOME}/.local/bin/python3.10" "${HOME}/.local/bin/pypy3.10"
 
 # Install CPython versions
-RUN uv python install -f cp3.14 cp3.14t cp3.13 cp3.12 cp3.11 cp3.10 cp3.9 cp3.8
+RUN uv python install -f cp3.14 cp3.14t cp3.13 cp3.12 cp3.11 cp3.10 cp3.9
 
 # Set default Python version to CPython 3.13
 RUN uv python install -f --default cp3.13

.github/workflows/benchmarks.yml

@@ -31,7 +31,7 @@ jobs:
     timeout-minutes: 30
     strategy:
       matrix:
-        python: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
+        python: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
 
     env:
       ASV_FACTOR: "1.1"

.github/workflows/deploy.yml

@@ -29,8 +29,6 @@ jobs:
       matrix:
         include:
           # Linux glibc
-          - wheel: cp38-manylinux
-            os: ubuntu-24.04
           - wheel: cp39-manylinux
             os: ubuntu-24.04
           - wheel: cp310-manylinux
@@ -48,8 +46,6 @@ jobs:
           - wheel: cp314t-manylinux
             os: ubuntu-24.04
           # Linux musllibc
-          - wheel: cp38-musllinux
-            os: ubuntu-24.04
           - wheel: cp39-musllinux
             os: ubuntu-24.04
           - wheel: cp310-musllinux

asv.conf.json

@@ -6,7 +6,7 @@
     "repo": ".",
     "environment_type": "virtualenv",
     "install_timeout": 120,
-    "pythons": ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13", "3.14"],
+    "pythons": ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"],
     "benchmark_dir": "tests/agent_benchmarks",
     "env_dir": ".asv/env",
     "results_dir": ".asv/results",

newrelic/admin/__init__.py

@@ -120,19 +120,7 @@ def load_internal_plugins():
 
 
 def load_external_plugins():
-    try:
-        # importlib.metadata was introduced into the standard library starting in Python 3.8.
-        from importlib.metadata import entry_points
-    except ImportError:
-        try:
-            # importlib_metadata is a backport library installable from PyPI.
-            from importlib_metadata import entry_points
-        except ImportError:
-            try:
-                # Fallback to pkg_resources, which is available in older versions of setuptools.
-                from pkg_resources import iter_entry_points as entry_points
-            except ImportError:
-                return
+    from importlib.metadata import entry_points
 
     group = "newrelic.admin"
 

newrelic/common/package_version_utils.py

@@ -12,6 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import importlib.metadata as importlib_metadata
 import sys
 import warnings
 from functools import lru_cache
@@ -95,37 +96,17 @@ def _get_package_version(name):
             except Exception:
                 pass
 
-    importlib_metadata = None
-    # importlib.metadata was introduced into the standard library starting in Python 3.8.
-    importlib_metadata = getattr(sys.modules.get("importlib", None), "metadata", None)
-    if importlib_metadata is None:
-        # importlib_metadata is a backport library installable from PyPI.
-        try:
-            import importlib_metadata
-        except ImportError:
-            pass
-
-    if importlib_metadata is not None:
-        try:
-            # In Python 3.10+ packages_distribution can be checked for as well.
-            if hasattr(importlib_metadata, "packages_distributions"):
-                distributions = importlib_metadata.packages_distributions()
-                distribution_name = distributions.get(name, name)
-                distribution_name = distribution_name[0] if isinstance(distribution_name, list) else distribution_name
-            else:
-                distribution_name = name
-
-            version = importlib_metadata.version(distribution_name)
-            if version not in NULL_VERSIONS:
-                return version
-        except Exception:
-            pass
-
-    # Fallback to pkg_resources, which is available in older versions of setuptools.
-    if "pkg_resources" in sys.modules:
-        try:
-            version = sys.modules["pkg_resources"].get_distribution(name).version
-            if version not in NULL_VERSIONS:
-                return version
-        except Exception:
-            pass
+    try:
+        # In Python 3.10+ packages_distribution can be checked for as well.
+        if hasattr(importlib_metadata, "packages_distributions"):
+            distributions = importlib_metadata.packages_distributions()
+            distribution_name = distributions.get(name, name)
+            distribution_name = distribution_name[0] if isinstance(distribution_name, list) else distribution_name
+        else:
+            distribution_name = name
+
+        version = importlib_metadata.version(distribution_name)
+        if version not in NULL_VERSIONS:
+            return version
+    except Exception:
+        pass

newrelic/config.py

@@ -4217,19 +4217,7 @@ def _process_module_builtin_defaults():
 
 
 def _process_module_entry_points():
-    try:
-        # importlib.metadata was introduced into the standard library starting in Python 3.8.
-        from importlib.metadata import entry_points
-    except ImportError:
-        try:
-            # importlib_metadata is a backport library installable from PyPI.
-            from importlib_metadata import entry_points
-        except ImportError:
-            try:
-                # Fallback to pkg_resources, which is available in older versions of setuptools.
-                from pkg_resources import iter_entry_points as entry_points
-            except ImportError:
-                return
+    from importlib.metadata import entry_points
 
     group = "newrelic.hooks"
 
@@ -4297,19 +4285,7 @@ def _setup_instrumentation():
 
 
 def _setup_extensions():
-    try:
-        # importlib.metadata was introduced into the standard library starting in Python 3.8.
-        from importlib.metadata import entry_points
-    except ImportError:
-        try:
-            # importlib_metadata is a backport library installable from PyPI.
-            from importlib_metadata import entry_points
-        except ImportError:
-            try:
-                # Fallback to pkg_resources, which is available in older versions of setuptools.
-                from pkg_resources import iter_entry_points as entry_points
-            except ImportError:
-                return
+    from importlib.metadata import entry_points
 
     group = "newrelic.extension"
 

newrelic/core/config.py

@@ -1119,8 +1119,7 @@ def _flatten(settings, o, name=None):
         for key, value in vars(o).items():
             # Remove any leading underscores on keys accessed through
             # properties for reporting.
-            if key.startswith("_"):
-                key = key[1:]
+            key = key.removeprefix("_")
 
             if name:
                 key = f"{name}.{key}"

newrelic/hooks/logger_structlog.py

@@ -22,7 +22,7 @@
 from newrelic.hooks.logger_logging import add_nr_linking_metadata
 
 
-@functools.lru_cache(maxsize=None)
+@functools.cache
 def normalize_level_name(method_name):
     # Look up level number for method name, using result to look up level name for that level number.
     # Convert result to upper case, and default to UNKNOWN in case of errors or missing values.

pyproject.toml

@@ -28,10 +28,9 @@ readme = "README.md"
 #     "LICENSE",
 #     "THIRD_PARTY_NOTICES.md",
 # ]
-requires-python = ">=3.8"  # python_requires is also located in setup.py
+requires-python = ">=3.9"  # python_requires is also located in setup.py
 classifiers = [
     "Development Status :: 5 - Production/Stable",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
@@ -105,7 +104,6 @@ git_describe_command = 'git describe --dirty --tags --long --match "*.*.*"'
 [tool.ruff]
 output-format = "grouped"
 line-length = 120
-target-version = "py38"
 force-exclude = true  # Fixes issue with megalinter config preventing exclusion of files
 extend-exclude = [
     "newrelic/packages/",

setup.py

@@ -17,11 +17,9 @@
 
 python_version = sys.version_info[:2]
 
-if python_version >= (3, 8):
-    pass
-else:
+if python_version < (3, 9):
     error_msg = (
-        "The New Relic Python agent only supports Python 3.8+. We recommend upgrading to a newer version of Python."
+        "The New Relic Python agent only supports Python 3.9+. We recommend upgrading to a newer version of Python."
     )
 
     try:
@@ -34,6 +32,7 @@
             (3, 5): "5.24.0.153",
             (3, 6): "7.16.0.178",
             (3, 7): "10.17.0",
+            (3, 8): "11.2.0",
         }
         last_supported_version = last_supported_version_lookup.get(python_version, None)
 
@@ -128,7 +127,7 @@ def build_extension(self, ext):
 
     kwargs.update(
         {
-            "python_requires": ">=3.8",  # python_requires is also located in pyproject.toml
+            "python_requires": ">=3.9",  # python_requires is also located in pyproject.toml
             "zip_safe": False,
             "packages": packages,
             "package_data": {

tests/agent_unittests/test_package_version_utils.py

@@ -27,17 +27,12 @@
 )
 
 # Notes:
-# importlib.metadata was a provisional addition to the std library in PY38 and PY39
+# importlib.metadata was a provisional addition to the std library in Python 3.8 and 3.9
 # while pkg_resources was deprecated.
-# importlib.metadata is no longer provisional in PY310+.  It added some attributes
+# importlib.metadata is no longer provisional in Python 3.10+. It added some attributes
 # such as distribution_packages and removed pkg_resources.
 
-IS_PY38_PLUS = sys.version_info[:2] >= (3, 8)
 IS_PY310_PLUS = sys.version_info[:2] >= (3, 10)
-SKIP_IF_NOT_IMPORTLIB_METADATA = pytest.mark.skipif(not IS_PY38_PLUS, reason="importlib.metadata is not supported.")
-SKIP_IF_IMPORTLIB_METADATA = pytest.mark.skipif(
-    IS_PY38_PLUS, reason="importlib.metadata is preferred over pkg_resources."
-)
 SKIP_IF_NOT_PY310_PLUS = pytest.mark.skipif(not IS_PY310_PLUS, reason="These features were added in 3.10+")
 
 
@@ -101,38 +96,20 @@ def test_get_package_version_tuple(monkeypatch, attr, value, expected_value):
     assert version == expected_value
 
 
-@SKIP_IF_NOT_IMPORTLIB_METADATA
 @validate_function_called("importlib.metadata", "version")
 def test_importlib_dot_metadata():
     # Test for importlib.metadata from the standard library.
     version = get_package_version("pytest")
     assert version not in NULL_VERSIONS, version
 
 
-@SKIP_IF_IMPORTLIB_METADATA
-@validate_function_called("importlib_metadata", "version")
-def test_importlib_underscore_metadata():
-    # Test for importlib_metadata, a backport library available on PyPI.
-    version = get_package_version("pytest")
-    assert version not in NULL_VERSIONS, version
-
-
 @SKIP_IF_NOT_PY310_PLUS
 @validate_function_called("importlib.metadata", "packages_distributions")
 def test_mapping_import_to_distribution_packages():
     version = get_package_version("pytest")
     assert version not in NULL_VERSIONS, version
 
 
-@SKIP_IF_IMPORTLIB_METADATA
-@validate_function_called("pkg_resources", "get_distribution")
-def test_pkg_resources_metadata(monkeypatch):
-    # Prevent importlib_metadata from being used by these tests
-    monkeypatch.setitem(sys.modules, "importlib_metadata", None)
-    version = get_package_version("pytest")
-    assert version not in NULL_VERSIONS, version
-
-
 def _getattr_deprecation_warning(attr):
     if attr == "__version__":
         warnings.warn("Testing deprecation warnings.", DeprecationWarning, stacklevel=2)

tests/framework_starlette/test_application.py

@@ -119,7 +119,6 @@ def test_exception_in_middleware(target_application, app_name):
     app = target_application[app_name]
 
     # Starlette >=0.15 and <0.17 raises an exception group instead of reraising the ValueError
-    # This only occurs on Python versions >=3.8
     if (0, 15, 0) <= starlette_version < (0, 17, 0):
         from anyio._backends._asyncio import ExceptionGroup
 

tests/framework_strawberry/_target_schema_async.py

@@ -14,8 +14,6 @@
 
 from __future__ import annotations
 
-from typing import List
-
 import strawberry
 
 try:
@@ -68,7 +66,7 @@ async def resolve_search(contains: str):
 class Query:
     library: Library = field(resolver=resolve_library)
     hello: str = field(resolver=resolve_hello)
-    search: List[Item] = field(resolver=resolve_search)
+    search: list[Item] = field(resolver=resolve_search)
     echo: str = field(resolver=resolve_echo)
     storage: Storage = field(resolver=resolve_storage)
     error: str | None = field(resolver=resolve_error)

tests/framework_strawberry/_target_schema_sync.py

@@ -14,7 +14,7 @@
 
 from __future__ import annotations
 
-from typing import List, Union
+from typing import Union
 
 import strawberry
 
@@ -56,12 +56,12 @@ class Magazine:
 class Library:
     id: int
     branch: str
-    magazine: List[Magazine]
-    book: List[Book]
+    magazine: list[Magazine]
+    book: list[Book]
 
 
 Item = Union[Book, Magazine]
-Storage = List[str]
+Storage = list[str]
 
 
 authors = [
@@ -138,7 +138,7 @@ def resolve_search(contains: str):
 class Query:
     library: Library = field(resolver=resolve_library)
     hello: str = field(resolver=resolve_hello)
-    search: List[Item] = field(resolver=resolve_search)
+    search: list[Item] = field(resolver=resolve_search)
     echo: str = field(resolver=resolve_echo)
     storage: Storage = field(resolver=resolve_storage)
     error: str | None = field(resolver=resolve_error)

tests/mlmodel_sklearn/test_inference_events.py

@@ -59,9 +59,9 @@ def _test():
     _test()
 
 
-label_type = "bool" if sys.version_info < (3, 8) else "numeric"
-true_label_value = "True" if sys.version_info < (3, 8) else "1.0"
-false_label_value = "False" if sys.version_info < (3, 8) else "0.0"
+label_type = "numeric"
+true_label_value = "1.0"
+false_label_value = "0.0"
 pandas_df_bool_recorded_custom_events = [
     (
         {"type": "InferenceData"},
@@ -87,7 +87,7 @@ def test_pandas_df_bool_feature_event():
     def _test():
         import sklearn.tree
 
-        dtype_name = "bool" if sys.version_info < (3, 8) else "boolean"
+        dtype_name = "boolean"
         x_train = pd.DataFrame({"col1": [True, False], "col2": [True, False]}, dtype=dtype_name)
         y_train = pd.DataFrame({"label": [True, False]}, dtype=dtype_name)
         x_test = pd.DataFrame({"col1": [True], "col2": [True]}, dtype=dtype_name)