allow latest python 3. added black and flake8

.flake8

@@ -0,0 +1,4 @@
+[flake8]
+exclude =
+    .git,
+    webpack

Pipfile

@@ -3,13 +3,13 @@ name = "pypi"
 url = "https://pypi.org/simple"
 verify_ssl = true
 
-[dev-packages]
-
 [packages]
+black = "==19.10b0"
+flake8 = "*"
 lektor = "*"
 # Werkzeug added and pinned to mitigate this issue:
 # https://github.com/nixjdm/lektor-atom/issues/23
 Werkzeug = "==0.16.1"
 
 [requires]
-python_version = "3.7"
+python_version = "3"

packages/checkfile/lektor_checkfile.py

@@ -4,15 +4,13 @@
 
 
 class CheckfilePlugin(Plugin):
-    name = 'CheckFile'
-    description = u'Plugin to check if a file is present.'
+    name = "CheckFile"
+    description = u"Plugin to check if a file is present."
 
     def on_setup_env(self, **extra):
-
         def check_file(filename):
             fn = os.path.join(self.env.root_path, filename)
-            assert os.path.isfile(fn), 'file {} does not exist'.format(fn)
+            assert os.path.isfile(fn), "file {} does not exist".format(fn)
             return ""
-        self.env.jinja_env.globals.update(
-            check_file=check_file
-        )
+
+        self.env.jinja_env.globals.update(check_file=check_file)

packages/checkfile/setup.py

@@ -4,35 +4,37 @@
 
 from setuptools import setup, find_packages
 
-with io.open('README.md', 'rt', encoding="utf8") as f:
+with io.open("README.md", "rt", encoding="utf8") as f:
     readme = f.read()
 
-_description_re = re.compile(r'description\s+=\s+(?P<description>.*)')
+_description_re = re.compile(r"description\s+=\s+(?P<description>.*)")
 
-with open('lektor_checkfile.py', 'rb') as f:
-    description = str(ast.literal_eval(_description_re.search(
-        f.read().decode('utf-8')).group(1)))
+with open("lektor_checkfile.py", "rb") as f:
+    description = str(
+        ast.literal_eval(
+            _description_re.search(f.read().decode("utf-8")).group(1)
+        )
+    )
 
 setup(
-    author='mayank',
-    author_email='[email protected]',
+    author="mayank",
+    author_email="[email protected]",
     description=description,
-    keywords='Lektor plugin',
-    license='MIT',
+    keywords="Lektor plugin",
+    license="MIT",
     long_description=readme,
-    long_description_content_type='text/markdown',
-    name='lektor-checkfile',
+    long_description_content_type="text/markdown",
+    name="lektor-checkfile",
     packages=find_packages(),
-    py_modules=['lektor_checkfile'],
+    py_modules=["lektor_checkfile"],
     # url='[link to your repository]',
-    version='0.1',
+    version="0.1",
     classifiers=[
-        'Framework :: Lektor',
-        'Environment :: Plugins',
+        "Environment :: Plugins",
+        "Framework :: Lektor",
+        "Programming Language :: Python :: 3",
     ],
     entry_points={
-        'lektor.plugins': [
-            'checkfile = lektor_checkfile:CheckfilePlugin',
-        ]
-    }
+        "lektor.plugins": ["checkfile = lektor_checkfile:CheckfilePlugin",]  # noqa: E231, E501
+    },
 )

packages/markdown-table/setup.py

@@ -21,7 +21,11 @@
     py_modules=["lektor_markdown_table"],
     url="https://github.com/sp35/lektor-markdown-table",
     version="0.1",
-    classifiers=["Framework :: Lektor", "Environment :: Plugins", ],
+    classifiers=[
+        "Framework :: Lektor",
+        "Environment :: Plugins",
+        "Programming Language :: Python :: 3",
+    ],
     entry_points={
         "lektor.plugins": [
             "markdown-table = lektor_markdown_table:MarkdownTablePlugin",

pyproject.toml

@@ -0,0 +1,8 @@
+[tool.black]
+line-length = 79
+exclude = '''
+/(
+      \.git
+    | webpack
+)/
+'''