reformat codebase using python/black (#87)

* reformat codebase using python/black

* black -l 80

* run black --check

* mention coding style

* just use black without options

* run black only on py3

* use yaml merge key to define a few special steps for py3

* lists cannot be merged ... my YAML foo is weak :-(

* maybe conditions do the trick

* bad old copy & paste

* define a new job, only for style checks

* fix typo; add link to black editor integration

* blacken setup.py

* remove accidentally added test_script

.circleci/config.yml

@@ -1,31 +1,44 @@
 version: 2.0
 
-my-steps: &steps
+build_and_test: &build_and_test_steps
   - checkout
   - run: sudo pip install -r requirements.txt
-  - run: sudo pip install flake8 pytest
-  - run: python --version ; pip --version ; pwd ; ls -l
   - run: pip install --user .
-  # stop the build if there are Python syntax errors or undefined names
-  - run: flake8 . --count --select=E9,F63,F72,F82 --show-source --statistics
-  # exit-zero treats all errors as warnings.  The GitHub editor is 127 chars wide
-  - run: flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+  - run: sudo pip install pytest
+  - run: python --version ; pip --version ; pwd ; ls -l
   - run: pytest
 
+
 jobs:
+  StyleCheck:
+    docker:
+      - image: circleci/python:3.7
+    steps:
+      - checkout
+      - run: sudo pip install flake8 black
+      - run: python --version ; pip --version ; pwd ; ls -l
+      # stop the build if there are Python syntax errors or undefined names
+      - run: flake8 . --count --select=E901,E999,F821,F822,F823 --show-source --statistics
+      # exit-zero treats all errors as warnings.  The GitHub editor is 127 chars wide
+      - run: flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+      - run: black . --check
+
+
   Python2:
     docker:
       - image: circleci/python:2.7.15
-    steps: *steps
+    steps: *build_and_test_steps
 
   Python3:
     docker:
       - image: circleci/python:3.7
-    steps: *steps
+    steps: *build_and_test_steps
+
 
 workflows:
   version: 2
   build:
     jobs:
+      - StyleCheck
       - Python2
       - Python3

CONTRIBUTING.md

@@ -18,3 +18,18 @@ Please submit patches by pull request where possible. Patches should add a test
 
 If you are having trouble running/add/fixing tests for your patch let me know and I'll see if I can help.
 
+
+Coding Style
+==============
+
+We'd like our code to follow PEP8 coding style in this project.
+We use [python/black](https://github.com/python/black) in order to make our lives easier.
+We propose you do the same within this project, otherwise you might be asked to
+reformat your pull requests.
+
+It's really simple just:
+
+    pip install black
+    black .
+
+And [there are plugins for many editors](https://black.readthedocs.io/en/stable/editor_integration.html).

docs/source/conf.py

@@ -19,32 +19,32 @@
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.
-#sys.path.insert(0, os.path.abspath('.'))
+# sys.path.insert(0, os.path.abspath('.'))
 
 # -- General configuration -----------------------------------------------------
 
 # If your documentation needs a minimal Sphinx version, state it here.
-#needs_sphinx = '1.0'
+# needs_sphinx = '1.0'
 
 # Add any Sphinx extension module names here, as strings. They can be extensions
 # coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
-extensions = ['sphinx.ext.autodoc', 'sphinx.ext.pngmath', 'sphinx.ext.viewcode']
+extensions = ["sphinx.ext.autodoc", "sphinx.ext.pngmath", "sphinx.ext.viewcode"]
 
 # Add any paths that contain templates here, relative to this directory.
-templates_path = ['_templates']
+templates_path = ["_templates"]
 
 # The suffix of source filenames.
-source_suffix = '.rst'
+source_suffix = ".rst"
 
 # The encoding of source files.
-#source_encoding = 'utf-8-sig'
+# source_encoding = 'utf-8-sig'
 
 # The master toctree document.
-master_doc = 'index'
+master_doc = "index"
 
 # General information about the project.
-project = u'sc2reader'
-copyright = u'2011-2013'
+project = u"sc2reader"
+copyright = u"2011-2013"
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
@@ -58,163 +58,159 @@
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
-#language = None
+# language = None
 
 # There are two options for replacing |today|: either, you set today to some
 # non-false value, then it is used:
-#today = ''
+# today = ''
 # Else, today_fmt is used as the format for a strftime call.
-#today_fmt = '%B %d, %Y'
+# today_fmt = '%B %d, %Y'
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
 exclude_patterns = []
 
 # The reST default role (used for this markup: `text`) to use for all documents.
-#default_role = None
+# default_role = None
 
 # If true, '()' will be appended to :func: etc. cross-reference text.
-#add_function_parentheses = True
+# add_function_parentheses = True
 
 # If true, the current module name will be prepended to all description
 # unit titles (such as .. function::).
-#add_module_names = True
+# add_module_names = True
 
 # If true, sectionauthor and moduleauthor directives will be shown in the
 # output. They are ignored by default.
-#show_authors = False
+# show_authors = False
 
 # The name of the Pygments (syntax highlighting) style to use.
-pygments_style = 'sphinx'
+pygments_style = "sphinx"
 
 # A list of ignored prefixes for module index sorting.
-#modindex_common_prefix = []
+# modindex_common_prefix = []
 
 
 # -- Options for HTML output ---------------------------------------------------
 
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
-html_theme = 'nature'
+html_theme = "nature"
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the
 # documentation.
-#html_theme_options = {}
+# html_theme_options = {}
 
 # Add any paths that contain custom themes here, relative to this directory.
-#html_theme_path = []
+# html_theme_path = []
 
 # The name for this set of Sphinx documents.  If None, it defaults to
 # "<project> v<release> documentation".
-#html_title = None
+# html_title = None
 
 # A shorter title for the navigation bar.  Default is the same as html_title.
-#html_short_title = None
+# html_short_title = None
 
 # The name of an image file (relative to this directory) to place at the top
 # of the sidebar.
-#html_logo = None
+# html_logo = None
 
 # The name of an image file (within the static path) to use as favicon of the
 # docs.  This file should be a Windows icon file (.ico) being 16x16 or 32x32
 # pixels large.
-#html_favicon = None
+# html_favicon = None
 
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = ['_static']
+html_static_path = ["_static"]
 
 # If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
 # using the given strftime format.
-#html_last_updated_fmt = '%b %d, %Y'
+# html_last_updated_fmt = '%b %d, %Y'
 
 # If true, SmartyPants will be used to convert quotes and dashes to
 # typographically correct entities.
-#html_use_smartypants = True
+# html_use_smartypants = True
 
 # Custom sidebar templates, maps document names to template names.
-#html_sidebars = {}
+# html_sidebars = {}
 
 # Additional templates that should be rendered to pages, maps page names to
 # template names.
-#html_additional_pages = {}
+# html_additional_pages = {}
 
 # If false, no module index is generated.
-#html_domain_indices = True
+# html_domain_indices = True
 
 # If false, no index is generated.
-#html_use_index = True
+# html_use_index = True
 
 # If true, the index is split into individual pages for each letter.
-#html_split_index = False
+# html_split_index = False
 
 # If true, links to the reST sources are added to the pages.
-#html_show_sourcelink = True
+# html_show_sourcelink = True
 
 # If true, "Created using Sphinx" is shown in the HTML footer. Default is True.
-#html_show_sphinx = True
+# html_show_sphinx = True
 
 # If true, "(C) Copyright ..." is shown in the HTML footer. Default is True.
-#html_show_copyright = True
+# html_show_copyright = True
 
 # If true, an OpenSearch description file will be output, and all pages will
 # contain a <link> tag referring to it.  The value of this option must be the
 # base URL from which the finished HTML is served.
-#html_use_opensearch = ''
+# html_use_opensearch = ''
 
 # This is the file name suffix for HTML files (e.g. ".xhtml").
-#html_file_suffix = None
+# html_file_suffix = None
 
 # Output file base name for HTML help builder.
-htmlhelp_basename = 'sc2readerdoc'
+htmlhelp_basename = "sc2readerdoc"
 
 
 # -- Options for LaTeX output --------------------------------------------------
 
 # The paper size ('letter' or 'a4').
-#latex_paper_size = 'letter'
+# latex_paper_size = 'letter'
 
 # The font size ('10pt', '11pt' or '12pt').
-#latex_font_size = '10pt'
+# latex_font_size = '10pt'
 
 # Grouping the document tree into LaTeX files. List of tuples
 # (source start file, target name, title, author, documentclass [howto/manual]).
 latex_documents = [
-  ('index', 'sc2reader.tex', u'sc2reader Documentation',
-   u'Graylin Kim', 'manual'),
+    ("index", "sc2reader.tex", u"sc2reader Documentation", u"Graylin Kim", "manual")
 ]
 
 # The name of an image file (relative to this directory) to place at the top of
 # the title page.
-#latex_logo = None
+# latex_logo = None
 
 # For "manual" documents, if this is true, then toplevel headings are parts,
 # not chapters.
-#latex_use_parts = False
+# latex_use_parts = False
 
 # If true, show page references after internal links.
-#latex_show_pagerefs = False
+# latex_show_pagerefs = False
 
 # If true, show URL addresses after external links.
-#latex_show_urls = False
+# latex_show_urls = False
 
 # Additional stuff for the LaTeX preamble.
-#latex_preamble = ''
+# latex_preamble = ''
 
 # Documents to append as an appendix to all manuals.
-#latex_appendices = []
+# latex_appendices = []
 
 # If false, no module index is generated.
-#latex_domain_indices = True
+# latex_domain_indices = True
 
 
 # -- Options for manual page output --------------------------------------------
 
 # One entry per manual page. List of tuples
 # (source start file, name, description, authors, manual section).
-man_pages = [
-    ('index', 'sc2reader', u'sc2reader Documentation',
-     [u'Graylin Kim'], 1)
-]
+man_pages = [("index", "sc2reader", u"sc2reader Documentation", [u"Graylin Kim"], 1)]