chore: drop Python 2.7 & 3.5 (#29)

* chore: drop Python 2 (mostly via pyupgrade)

* chore: dropping Python 2 style type comments

* fix: support 3.6 again

* ci: update build a bit

* docs: drop Python 2 from the readme

Author: henryiii

.github/workflows/ci.yml

@@ -15,7 +15,6 @@ jobs:
       fail-fast: false
       matrix:
         python-version:
-        - 2.7
         - 3.6
         - 3.8
         - 3.9
@@ -51,16 +50,12 @@ jobs:
       run: python -m pytest tests/root_tests -ra
 
   dist:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
     - uses: actions/checkout@v1
-    - uses: actions/setup-python@v2
-
-    - name: Install wheel and sdist requirements
-      run: python -m pip install "build"
 
     - name: Build sdist and wheel
-      run: python -m build
+      run: pipx run --spec build pyproject-build
 
     - uses: actions/upload-artifact@v2
       with:

.pre-commit-config.yaml

@@ -1,4 +1,10 @@
 repos:
+- repo: https://github.com/asottile/pyupgrade
+  rev: v2.10.0
+  hooks:
+  - id: pyupgrade
+    args: [--py36-plus]
+
 - repo: https://github.com/psf/black
   rev: 20.8b1
   hooks:
@@ -18,13 +24,6 @@ repos:
   - id: requirements-txt-fixer
   - id: trailing-whitespace
 
-- repo: https://github.com/asottile/pyupgrade
-  rev: v2.10.0
-  hooks:
-  - id: pyupgrade
-    # args: [--py36-plus]
-
-
 - repo: https://github.com/PyCQA/isort
   rev: 5.7.0
   hooks:
@@ -34,7 +33,6 @@ repos:
   rev: v1.16.0
   hooks:
   - id: setup-cfg-fmt
-    args: [--min-py3-version, "3.5"]
 
 - repo: https://github.com/mgedmin/check-manifest
   rev: "0.46"

README.md

@@ -15,10 +15,6 @@
 Vector classes and utilities. See [CONTRIBUTING.md](./.github/CONTRIBUTING.md)
 for information on setting up a development environment.
 
-Python 2 is partially supported; the simple, NumPy, and Awkward backends
-support Python 2. The Numba and AwkwardNumba (and TensorFlow, in the future)
-backends do not.
-
 
 
 [gitter-badge]:  https://badges.gitter.im/Scikit-HEP/vector.svg

docs/conf.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Configuration file for the Sphinx documentation builder.
 #
 # This file only contains a selection of the most common options. For a full

setup.cfg

@@ -19,10 +19,8 @@ classifiers =
     License :: OSI Approved :: BSD License
     Operating System :: OS Independent
     Programming Language :: Python
-    Programming Language :: Python :: 2
-    Programming Language :: Python :: 2.7
     Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.5
+    Programming Language :: Python :: 3 :: Only
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
@@ -35,9 +33,8 @@ keywords =
 packages = find:
 install_requires =
     numpy>=1.13.3
-    typing;python_version<"3.5"
     typing_extensions;python_version<"3.8"
-python_requires = >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*
+python_requires = >=3.6
 package_dir =
     =src
 
@@ -74,9 +71,6 @@ ignore_missing_imports = True
 [mypy-awkward]
 ignore_missing_imports = True
 
-[bdist_wheel]
-universal = 1
-
 [tool.check-manifest]
 ignore =
     .github

setup.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# -*- coding: utf-8 -*-
 # Copyright (c) 2019-2020, Jonas Eschle, Jim Pivarski, Eduardo Rodrigues, and Henry Schreiner.
 #
 # Distributed under the 3-clause BSD license, see accompanying file LICENSE

src/vector/__init__.py

@@ -1,10 +1,8 @@
-# -*- coding: utf-8 -*-
 # Copyright (c) 2019-2020, Jonas Eschle, Jim Pivarski, Eduardo Rodrigues, and Henry Schreiner.
 #
 # Distributed under the 3-clause BSD license, see accompanying file LICENSE
 # or https://github.com/scikit-hep/vector for details.
 
-from __future__ import absolute_import, division, print_function
 
 # Convenient access to the version number
 from .version import version as __version__

src/vector/awkward/__init__.py

@@ -1,7 +1,4 @@
-# -*- coding: utf-8 -*-
 # Copyright (c) 2019-2020, Jonas Eschle, Jim Pivarski, Eduardo Rodrigues, and Henry Schreiner.
 #
 # Distributed under the 3-clause BSD license, see accompanying file LICENSE
 # or https://github.com/scikit-hep/vector for details.
-
-from __future__ import absolute_import, division, print_function

src/vector/awkward/lorentz/__init__.py

@@ -1,7 +1,4 @@
-# -*- coding: utf-8 -*-
 # Copyright (c) 2019-2020, Jonas Eschle, Jim Pivarski, Eduardo Rodrigues, and Henry Schreiner.
 #
 # Distributed under the 3-clause BSD license, see accompanying file LICENSE
 # or https://github.com/scikit-hep/vector for details.
-
-from __future__ import absolute_import, division, print_function

src/vector/awkward/lorentz/xyzt.py

@@ -1,10 +1,8 @@
-# -*- coding: utf-8 -*-
 # Copyright (c) 2019-2020, Jonas Eschle, Jim Pivarski, Eduardo Rodrigues, and Henry Schreiner.
 #
 # Distributed under the 3-clause BSD license, see accompanying file LICENSE
 # or https://github.com/scikit-hep/vector for details.
 
-from __future__ import absolute_import, division, print_function
 
 import numbers
 from typing import Any, Dict
@@ -42,7 +40,7 @@ def _create_behavior_r(function):
 
 
 # Define some behaviors for Lorentz vectors.
-behavior = dict()  # type: Dict[Any, Any]
+behavior: Dict[Any, Any] = dict()
 
 # Any records with __record__ = "LorentzXYZT" will be mapped to LorentzXYZT instances.
 behavior["LorentzXYZT"] = LorentzXYZT