Drop 3.7 support (#263)

.github/workflows/check.yml

@@ -18,12 +18,11 @@ jobs:
       fail-fast: false
       matrix:
         py:
-          - "3.12.0-beta.2"
+          - "3.12.0-beta.4"
           - "3.11"
           - "3.10"
           - "3.9"
           - "3.8"
-          - "3.7"
     steps:
       - name: Install OS dependencies
         run: |
@@ -60,7 +59,7 @@ jobs:
 
   check:
     name: tox env ${{ matrix.tox_env }}
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:

README.md

@@ -1,5 +1,9 @@
 # pipdeptree
 
+[![PyPI](https://img.shields.io/pypi/v/tox)](https://pypi.org/project/pipdeptree/)
+[![Supported Python
+versions](https://img.shields.io/pypi/pyversions/tox.svg)](https://pypi.org/project/pipdeptree/)
+[![Downloads](https://pepy.tech/badge/tox/month)](https://pepy.tech/project/pipdeptree)
 [![check](https://github.com/tox-dev/pipdeptree/actions/workflows/check.yml/badge.svg)](https://github.com/tox-dev/pipdeptree/actions/workflows/check.yml)
 [![pre-commit.ci status](https://results.pre-commit.ci/badge/github/tox-dev/pipdeptree/main.svg)](https://results.pre-commit.ci/latest/github/tox-dev/pipdeptree/main)
 
@@ -18,8 +22,6 @@ To some extent, `pipdeptree` is inspired by the `lein deps :tree` command of [Le
 pip install pipdeptree
 ```
 
-pipdeptree has been tested with Python versions `3.7`, `3.8`, `3.9` and `3.10`.
-
 ## Running in virtualenvs
 
 `New in ver. 2.0.0`

pyproject.toml

@@ -21,7 +21,7 @@ maintainers = [
   { name = "Bernát Gábor", email = "gaborjbernat@gmail.com" },
   { name = "Vineet Naik", email = "naikvin@gmail.com" },
 ]
-requires-python = ">=3.7"
+requires-python = ">=3.8"
 classifiers = [
   "Development Status :: 5 - Production/Stable",
   "Environment :: Console",
@@ -30,7 +30,6 @@ classifiers = [
   "Operating System :: OS Independent",
   "Programming Language :: Python",
   "Programming Language :: Python :: 3 :: Only",
-  "Programming Language :: Python :: 3.7",
   "Programming Language :: Python :: 3.8",
   "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
@@ -69,7 +68,7 @@ line-length = 120
 [tool.ruff]
 select = ["ALL"]
 line-length = 120
-target-version = "py37"
+target-version = "py38"
 isort = {known-first-party = ["pipdeptree"], required-imports = ["from __future__ import annotations"]}
 ignore = [
   "INP001", # no implicit namespace

src/pipdeptree/_models.py

@@ -1,10 +1,10 @@
 from __future__ import annotations
 
-import sys
 from abc import ABC, abstractmethod
 from collections import defaultdict, deque
 from fnmatch import fnmatch
 from importlib import import_module
+from importlib.metadata import PackageNotFoundError, version
 from inspect import ismodule
 from itertools import chain
 from typing import TYPE_CHECKING, Any, Iterator, List, Mapping, cast
@@ -413,12 +413,8 @@ def guess_version(pkg_key: str, default: str = "?") -> str:
     :returns: version
     """
     try:
-        if sys.version_info >= (3, 8):  # pragma: >=3.8 cover
-            import importlib.metadata as importlib_metadata
-        else:  # pragma: <3.8 cover
-            import importlib_metadata
-        return importlib_metadata.version(pkg_key)
-    except ImportError:
+        return version(pkg_key)
+    except PackageNotFoundError:
         pass
     # Avoid AssertionError with setuptools, see https://github.com/tox-dev/pipdeptree/issues/162
     if pkg_key in {"setuptools"}:

tests/models/guess_version_setuptools.py

@@ -1,19 +0,0 @@
-from __future__ import annotations
-
-import sys
-from typing import NoReturn
-
-from pipdeptree._models import guess_version
-
-if sys.version_info >= (3, 8):
-    import importlib.metadata as importlib_metadata
-else:
-    import importlib_metadata
-
-
-def raise_import_error(name: str) -> NoReturn:
-    raise ImportError(name)
-
-
-importlib_metadata.version = raise_import_error  # type: ignore[assignment]
-print(guess_version("setuptools"), end="")  # noqa: T201

tests/test_models.py

@@ -1,17 +1,17 @@
 from __future__ import annotations
 
-import sys
+from importlib.metadata import PackageNotFoundError
 from itertools import chain
-from pathlib import Path
-from subprocess import check_output
 from typing import TYPE_CHECKING, Any, Callable, Iterator
 from unittest.mock import Mock
 
 import pytest
 
-from pipdeptree._models import DistPackage, PackageDAG, ReqPackage, ReversedPackageDAG
+from pipdeptree._models import DistPackage, PackageDAG, ReqPackage, ReversedPackageDAG, guess_version
 
 if TYPE_CHECKING:
+    from pytest_mock import MockerFixture
+
     from tests.our_types import MockGraph
 
 
@@ -23,10 +23,10 @@ def dag_to_dict(g: PackageDAG) -> dict[str, list[str]]:
     return {k.key: [v.key for v in vs] for k, vs in g._obj.items()}  # noqa: SLF001
 
 
-def test_guess_version_setuptools() -> None:
-    script = Path(__file__).parent / "guess_version_setuptools.py"
-    output = check_output([sys.executable, script], text=True)
-    assert output == "?"
+def test_guess_version_setuptools(mocker: MockerFixture) -> None:
+    mocker.patch("pipdeptree._models.version", side_effect=PackageNotFoundError)
+    result = guess_version("setuptools")
+    assert result == "?"
 
 
 def test_package_dag_get_node_as_parent(example_dag: PackageDAG) -> None:

tox.ini

@@ -8,7 +8,6 @@ env_list =
     py310
     py39
     py38
-    py37
     type
     readme
 skip_missing_interpreters = true