Drop support for Python 3.6 (#165)

.github/workflows/test.yml

@@ -9,7 +9,7 @@ jobs:
   test:
     strategy:
       matrix:
-        python: ['3.6', '3.7', '3.8', '3.9', '3.10']
+        python: ['3.7', '3.8', '3.9', '3.10']
         platform: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.platform }}
     steps:

setup.py

@@ -12,7 +12,7 @@
 here = pathlib.Path(__file__).parent.resolve()
 
 # Get the long description from the README file
-long_description = (here / 'README.md').read_text(encoding='utf-8')
+long_description = (here / "README.md").read_text(encoding="utf-8")
 
 # Arguments marked as "Required" below must be included for upload to PyPI.
 # Fields marked as "Optional" may be commented out.
@@ -29,21 +29,18 @@
     # There are some restrictions on what makes a valid project name
     # specification here:
     # https://packaging.python.org/specifications/core-metadata/#name
-    name='sampleproject',  # Required
-
+    name="sampleproject",  # Required
     # Versions should comply with PEP 440:
     # https://www.python.org/dev/peps/pep-0440/
     #
     # For a discussion on single-sourcing the version across setup.py and the
     # project code, see
     # https://packaging.python.org/guides/single-sourcing-package-version/
-    version='2.0.0',  # Required
-
+    version="2.0.0",  # Required
     # This is a one-line description or tagline of what your project does. This
     # corresponds to the "Summary" metadata field:
     # https://packaging.python.org/specifications/core-metadata/#summary
-    description='A sample Python project',  # Optional
-
+    description="A sample Python project",  # Optional
     # This is an optional longer description of your project that represents
     # the body of text which users will see when they visit PyPI.
     #
@@ -53,7 +50,6 @@
     # This field corresponds to the "Description" metadata field:
     # https://packaging.python.org/specifications/core-metadata/#description-optional
     long_description=long_description,  # Optional
-
     # Denotes that our long_description is in Markdown; valid values are
     # text/plain, text/x-rst, and text/markdown
     #
@@ -64,22 +60,18 @@
     #
     # This field corresponds to the "Description-Content-Type" metadata field:
     # https://packaging.python.org/specifications/core-metadata/#description-content-type-optional
-    long_description_content_type='text/markdown',  # Optional (see note above)
-
+    long_description_content_type="text/markdown",  # Optional (see note above)
     # This should be a valid link to your project's main homepage.
     #
     # This field corresponds to the "Home-Page" metadata field:
     # https://packaging.python.org/specifications/core-metadata/#home-page-optional
-    url='https://github.com/pypa/sampleproject',  # Optional
-
+    url="https://github.com/pypa/sampleproject",  # Optional
     # This should be your name or the name of the organization which owns the
     # project.
-    author='A. Random Developer',  # Optional
-
+    author="A. Random Developer",  # Optional
     # This should be a valid email address corresponding to the author listed
     # above.
-    author_email='[email protected]',  # Optional
-
+    author_email="[email protected]",  # Optional
     # Classifiers help users find your project by categorizing it.
     #
     # For a list of valid classifiers, see https://pypi.org/classifiers/
@@ -88,39 +80,32 @@
         #   3 - Alpha
         #   4 - Beta
         #   5 - Production/Stable
-        'Development Status :: 3 - Alpha',
-
+        "Development Status :: 3 - Alpha",
         # Indicate who your project is intended for
-        'Intended Audience :: Developers',
-        'Topic :: Software Development :: Build Tools',
-
+        "Intended Audience :: Developers",
+        "Topic :: Software Development :: Build Tools",
         # Pick your license as you wish
-        'License :: OSI Approved :: MIT License',
-
+        "License :: OSI Approved :: MIT License",
         # Specify the Python versions you support here. In particular, ensure
         # that you indicate you support Python 3. These classifiers are *not*
         # checked by 'pip install'. See instead 'python_requires' below.
-        'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.6',
-        'Programming Language :: Python :: 3.7',
-        'Programming Language :: Python :: 3.8',
-        'Programming Language :: Python :: 3.9',
+        "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
-        'Programming Language :: Python :: 3 :: Only',
+        "Programming Language :: Python :: 3 :: Only",
     ],
-
     # This field adds keywords for your project which will appear on the
     # project page. What does your project relate to?
     #
     # Note that this is a list of additional keywords, separated
     # by commas, to be used to assist searching for the distribution in a
     # larger catalog.
-    keywords='sample, setuptools, development',  # Optional
-
+    keywords="sample, setuptools, development",  # Optional
     # When your source code is in a subdirectory under the project root, e.g.
     # `src/`, it is necessary to specify the `package_dir` argument.
-    package_dir={'': 'src'},  # Optional
-
+    package_dir={"": "src"},  # Optional
     # You can just specify package directories manually here if your project is
     # simple. Or you can use find_packages().
     #
@@ -130,22 +115,19 @@
     #
     #   py_modules=["my_module"],
     #
-    packages=find_packages(where='src'),  # Required
-
+    packages=find_packages(where="src"),  # Required
     # Specify which Python versions you support. In contrast to the
     # 'Programming Language' classifiers above, 'pip install' will check this
     # and refuse to install the project if the version does not match. See
     # https://packaging.python.org/guides/distributing-packages-using-setuptools/#python-requires
-    python_requires='>=3.6, <4',
-
+    python_requires=">=3.7, <4",
     # This field lists other packages that your project depends on to run.
     # Any package you put here will be installed by pip when your project is
     # installed, so they must be valid existing projects.
     #
     # For an analysis of "install_requires" vs pip's requirements files see:
     # https://packaging.python.org/discussions/install-requires-vs-requirements/
-    install_requires=['peppercorn'],  # Optional
-
+    install_requires=["peppercorn"],  # Optional
     # List additional groups of dependencies here (e.g. development
     # dependencies). Users will be able to install these using the "extras"
     # syntax, for example:
@@ -155,23 +137,20 @@
     # Similar to `install_requires` above, these must be valid existing
     # projects.
     extras_require={  # Optional
-        'dev': ['check-manifest'],
-        'test': ['coverage'],
+        "dev": ["check-manifest"],
+        "test": ["coverage"],
     },
-
     # If there are data files included in your packages that need to be
     # installed, specify them here.
     package_data={  # Optional
-        'sample': ['package_data.dat'],
+        "sample": ["package_data.dat"],
     },
-
     # Although 'package_data' is the preferred approach, in some case you may
     # need to place data files outside of your packages. See:
     # http://docs.python.org/distutils/setupscript.html#installing-additional-files
     #
     # In this case, 'data_file' will be installed into '<sys.prefix>/my_data'
-    data_files=[('my_data', ['data/data_file'])],  # Optional
-
+    data_files=[("my_data", ["data/data_file"])],  # Optional
     # To provide executable scripts, use entry points in preference to the
     # "scripts" keyword. Entry points provide cross-platform support and allow
     # `pip` to create the appropriate form of executable for the target
@@ -180,11 +159,10 @@
     # For example, the following would provide a command called `sample` which
     # executes the function `main` from this package when invoked:
     entry_points={  # Optional
-        'console_scripts': [
-            'sample=sample:main',
+        "console_scripts": [
+            "sample=sample:main",
         ],
     },
-
     # List additional URLs that are relevant to your project as a dict.
     #
     # This field corresponds to the "Project-URL" metadata fields:
@@ -195,9 +173,9 @@
     # maintainers, and where to support the project financially. The key is
     # what's used to render the link text on PyPI.
     project_urls={  # Optional
-        'Bug Reports': 'https://github.com/pypa/sampleproject/issues',
-        'Funding': 'https://donate.pypi.org',
-        'Say Thanks!': 'http://saythanks.io/to/example',
-        'Source': 'https://github.com/pypa/sampleproject/',
+        "Bug Reports": "https://github.com/pypa/sampleproject/issues",
+        "Funding": "https://donate.pypi.org",
+        "Say Thanks!": "http://saythanks.io/to/example",
+        "Source": "https://github.com/pypa/sampleproject/",
     },
 )

tox.ini

@@ -13,7 +13,7 @@
 #  and also to help confirm pull requests to this project.
 
 [tox]
-envlist = py{36,37,38,39,310}
+envlist = py{37,38,39,310}
 
 # Define the minimal tox version required to run;
 # if the host tox is less than this the tool with create an environment and