Try using setup.cfg declarative metadata

.pre-commit-config.yaml

@@ -26,7 +26,7 @@ repos:
     rev: pylint-2.6.0
     hooks:
       - id: pylint
-        exclude: ^docs/conf\.py$
+        files: ^nbqa/
   - repo: https://gitlab.com/pycqa/flake8
     rev: 3.8.4
     hooks:
@@ -39,18 +39,18 @@ repos:
     rev: 5.1.1
     hooks:
       - id: pydocstyle
-        exclude: ^docs/
+        files: ^nbqa/
   - repo: https://github.com/econchick/interrogate
     rev: 1.3.1
     hooks:
       - id: interrogate
         args: [-v, --fail-under=100]
-        exclude: ^docs/|__init__\.py$
+        files: ^nbqa/
   - repo: https://github.com/pre-commit/mirrors-mypy
     rev: v0.790
     hooks:
       - id: mypy
-        exclude: ^docs/
+        files: ^nbqa/
   - repo: https://github.com/asottile/pyupgrade
     rev: v2.7.3
     hooks:
@@ -71,3 +71,7 @@ repos:
       - id: rst-backticks
       - id: rst-directive-colons
       - id: rst-inline-touching-normal
+  - repo: https://github.com/asottile/setup-cfg-fmt
+    rev: v1.15.1
+    hooks:
+      - id: setup-cfg-fmt

nbqa/config.py

@@ -3,6 +3,9 @@
 from shlex import split
 from typing import Any, Callable, ClassVar, Dict, List, Mapping, NamedTuple, Optional
 
+import toml
+from pkg_resources import resource_filename
+
 from nbqa.cmdline import CLIArgs
 
 
@@ -18,12 +21,9 @@ class _ConfigSections(NamedTuple):  # pylint: disable=R0903
 CONFIG_SECTIONS = _ConfigSections()
 
 
-DEFAULT_CONFIG: Mapping[str, Mapping] = {
-    "addopts": {"isort": ["--treat-comment-as-code", "# %%"]},
-    "ignore_cells": {},
-    "mutate": {},
-    "config": {},
-}
+DEFAULT_CONFIG: Mapping[str, Mapping] = toml.load(
+    resource_filename("nbqa.config_files", "default_config.toml")
+)
 
 
 class Configs:

nbqa/config_files/__init__.py

@@ -0,0 +1 @@
+"""Configuration files."""

nbqa/config_files/default_config.toml

@@ -0,0 +1,8 @@
+[addopts]
+isort = ["--treat-comment-as-code", "# %%"]
+
+[config]
+
+[mutate]
+
+[ignore_cells]

setup.cfg

@@ -1,3 +1,48 @@
+[metadata]
+name = nbqa
+version = 0.3.6
+description = Run any standard Python code quality tool on a Jupyter Notebook
+long_description = file: README.md
+long_description_content_type = text/markdown
+url = https://github.com/nbQA-dev/nbQA
+author = Marco Gorelli, Girish Pasupathy
+license = MIT
+license_file = LICENSE
+classifiers =
+    Development Status :: 4 - Beta
+    Intended Audience :: Developers
+    License :: OSI Approved :: MIT License
+    Natural Language :: English
+    Programming Language :: Python :: 3
+    Programming Language :: Python :: 3 :: Only
+    Programming Language :: Python :: 3.6
+    Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
+
+[options]
+packages = find:
+py_modules = nbqa
+install_requires =
+    toml
+    importlib_metadata;python_version < '3.8'
+python_requires = >=3.6
+
+[options.entry_points]
+console_scripts =
+    nbqa = nbqa.__main__:main
+
+[options.package_data]
+nbqa =
+    config_files/default_config.toml
+
+[options.packages.find]
+exclude =
+    tests*
+
+[bdist_wheel]
+universal = True
+
 [bumpversion]
 current_version = 0.3.6
 

setup.py

@@ -1,51 +1,3 @@
-#!/usr/bin/env python
+from setuptools import setup
 
-"""The setup script."""
-from pathlib import Path
-
-from setuptools import find_packages, setup
-
-readme = Path("README.md").read_text(encoding="utf8")
-
-requirements = ["toml", "importlib_metadata; python_version < '3.8'"]
-
-setup_requirements = []
-
-test_requirements = []
-
-extra_requirements = {
-    "toolchain": ["black", "mypy", "isort", "pyupgrade", "flake8", "pylint"]
-}
-
-setup(
-    author="Marco Gorelli, Girish Pasupathy",
-    python_requires=">=3.6",
-    classifiers=[
-        "Development Status :: 4 - Beta",
-        "Intended Audience :: Developers",
-        "License :: OSI Approved :: MIT License",
-        "Natural Language :: English",
-        "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.6",
-        "Programming Language :: Python :: 3.7",
-        "Programming Language :: Python :: 3.8",
-        "Programming Language :: Python :: 3.9",
-    ],
-    description="Run any Python code quality tool on a Jupyter Notebook!",
-    entry_points={"console_scripts": ["nbqa=nbqa.__main__:main"]},
-    install_requires=requirements,
-    license="MIT license",
-    long_description=readme,
-    long_description_content_type="text/markdown",
-    include_package_data=True,
-    keywords="nbqa",
-    name="nbqa",
-    packages=find_packages(include=["nbqa", "nbqa.*"]),
-    setup_requires=setup_requirements,
-    test_suite="tests",
-    tests_require=test_requirements,
-    extras_require=extra_requirements,
-    url="https://github.com/nbQA-dev/nbQA",
-    version="0.3.6",
-    zip_safe=False,
-)
+setup()