BREAK!: drop Python 3.7 support

.pre-commit-config.yaml

@@ -64,7 +64,7 @@ repos:
     hooks:
       - id: nbqa-pyupgrade
         args:
-          - --py37-plus
+          - --py38-plus
       - id: nbqa-ruff
         args:
           - --fix
@@ -161,7 +161,7 @@ repos:
     hooks:
       - id: pyupgrade
         args:
-          - --py37-plus
+          - --py38-plus
 
   - repo: https://github.com/astral-sh/ruff-pre-commit
     rev: v0.0.292

docs/conf.py

@@ -12,13 +12,8 @@
 import sys
 
 import requests
-
-if sys.version_info < (3, 8):
-    from importlib_metadata import PackageNotFoundError
-    from importlib_metadata import version as get_package_version
-else:
-    from importlib.metadata import PackageNotFoundError
-    from importlib.metadata import version as get_package_version
+from importlib_metadata import PackageNotFoundError
+from importlib_metadata import version as get_package_version
 
 # -- Project information -----------------------------------------------------
 project = "TensorWaves"

pyproject.toml

@@ -17,7 +17,6 @@ classifiers = [
     "Operating System :: OS Independent",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
-    "Programming Language :: Python :: 3.7",
     "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python",
@@ -47,7 +46,7 @@ keywords = [
 license = {text = "GPLv3 or later"}
 maintainers = [{email = "[email protected]"}]
 name = "tensorwaves"
-requires-python = ">=3.7"
+requires-python = ">=3.8"
 
 [project.optional-dependencies]
 all = [
@@ -84,7 +83,6 @@ doc = [
     "sphinx-togglebutton",
     "sphobjinv",
     "tensorwaves[all]",
-    'importlib-metadata; python_version <"3.8.0"',
 ]
 format = [
     "black",
@@ -100,7 +98,6 @@ jupyter = [
     "jupyterlab-myst",
     "python-lsp-server[rope]",
     "tensorwaves[doc]",
-    'ypy-websocket <0.8.3; python_version <"3.8.0"',
 ]
 lint = [
     "ruff",
@@ -126,7 +123,6 @@ phasespace = [
 phsp = [
     "phasespace[tf] >=1.7.0",
     "tensorwaves[tensorflow]",
-    'phasespace <1.9.0; python_version <"3.8.0"',
 ]
 pwa = [
     "ampform >=0.12.0", # https://github.com/ComPWA/ampform/pull/177
@@ -150,7 +146,6 @@ test = [
     "pytest-cov",
     "pytest-xdist",
     "tensorwaves[test-types]",
-    'nbmake <1.3; python_version <"3.8.0"',
 ]
 test-types = [
     "ipython", # test _repr_pretty_
@@ -207,7 +202,6 @@ preview = true
 target-version = [
     "py310",
     "py311",
-    "py37",
     "py38",
     "py39",
 ]
@@ -399,7 +393,7 @@ src = [
     "src",
     "tests",
 ]
-target-version = "py37"
+target-version = "py38"
 task-tags = ["cspell"]
 
 [tool.ruff.per-file-ignores]

tests/function/test_sympy.py

@@ -1,7 +1,6 @@
 from __future__ import annotations
 
 import logging
-import sys
 from typing import TYPE_CHECKING
 
 import numpy as np
@@ -117,11 +116,7 @@ def test_fast_lambdify(backend: str, max_complexity: int, use_cse: bool):
         # cspell:ignore lambdifygenerated
         repr_start = "<function _lambdifygenerated"
     if backend == "jax":
-        if sys.version_info < (3, 8):
-            repr_start = "<CompiledFunction of " + repr_start
-        else:
-            repr_start = "<PjitFunction of " + repr_start
-        # cspell:ignore Pjit
+        repr_start = "<CompiledFunction of " + repr_start
     assert func_repr.startswith(repr_start)
 
     data = (