add Black (pre-commit hook) and flake8 (PR annotations) runs (#96)

* add black pre-commit hook and reformat files using black

* add github action workflow with flake8 on PRs

.github/workflows/flake8_action.yml

@@ -0,0 +1,20 @@
+# use the flake8 linter to annotate improperly formatted code
+# from: https://github.com/marketplace/actions/run-flake8-on-your-pr-with-annotations
+name: Run flake8 linter on PRs
+
+on:
+  pull_request:
+    branches:
+      - development
+      - master
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Annotate PR after running flake8
+        uses: TrueBrain/actions-flake8@master
+        with:
+          max_line_length: 90
+        # https://github.com/marketplace/actions/run-flake8-on-your-pr-with-annotations?version=1.0.1
+        # uses: tayfun/flake8-your-pr@master
+        # secrets: ["GITHUB_TOKEN"]

.pre-commit-config.yaml

@@ -0,0 +1,5 @@
+repos:
+-   repo: https://github.com/psf/black
+    rev: stable
+    hooks:
+    - id: black

doc/source/conf.py

@@ -12,7 +12,8 @@
 #
 import os
 import sys
-sys.path.insert(0, os.path.abspath('../..'))
+
+sys.path.insert(0, os.path.abspath("../.."))
 import datetime
 
 import icepyx
@@ -21,9 +22,9 @@
 
 # -- Project information -----------------------------------------------------
 
-project = 'icepyx'
+project = "icepyx"
 year = datetime.date.today().year
-copyright = '2019-{}, The icepyx Developers'.format(year)
+copyright = "2019-{}, The icepyx Developers".format(year)
 
 # -- General configuration ---------------------------------------------------
 
@@ -35,24 +36,23 @@
     "sphinx.ext.autosectionlabel",
     "numpydoc",
     "nbsphinx",
-    "recommonmark"
-
+    "recommonmark",
 ]
 source_suffix = {
-    '.rst': 'restructuredtext',
-    '.txt': 'markdown',
-    '.md': 'markdown',
+    ".rst": "restructuredtext",
+    ".txt": "markdown",
+    ".md": "markdown",
 }
 # Add any paths that contain templates here, relative to this directory.
-templates_path = ['_templates']
+templates_path = ["_templates"]
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
 # This pattern also affects html_static_path and html_extra_path.
-exclude_patterns = ['**.ipynb_checkpoints']
+exclude_patterns = ["**.ipynb_checkpoints"]
 
 # location of master document (by default sphinx looks for contents.rst)
-master_doc = 'index'
+master_doc = "index"
 
 
 # -- Configuration options ---------------------------------------------------
@@ -68,24 +68,30 @@
 # html_theme = 'alabaster'
 html_theme = "sphinx_rtd_theme"
 html_theme_options = {
-    'logo_only': True,
-    'display_version': False,
-    'prev_next_buttons_location': None,
-    'navigation_depth': 4,
-    'collapse_navigation': True
+    "logo_only": True,
+    "display_version": False,
+    "prev_next_buttons_location": None,
+    "navigation_depth": 4,
+    "collapse_navigation": True,
 }
-html_logo = '_static/icepyx_v2_oval_orig_nobackgr.png'
-html_favicon = '_static/icepyx_v2_oval_tiny-uml_nobackgr.png'
-html_static_path = ['_static']
+html_logo = "_static/icepyx_v2_oval_orig_nobackgr.png"
+html_favicon = "_static/icepyx_v2_oval_tiny-uml_nobackgr.png"
+html_static_path = ["_static"]
 
 html_context = {
-    'menu_links_name': '',
-    'menu_links': [
-        ('<i class="fa fa-github fa-fw"></i> icepyx Github', 'https://github.com/icesat2py/icepyx'),
-        ('<i class="fa fa-comments fa-fw"></i> Pangeo Discourse', 'https://discourse.pangeo.io/t/icepyx-python-tools-for-icesat-2-data/404/2')
-
-    ]
+    "menu_links_name": "",
+    "menu_links": [
+        (
+            '<i class="fa fa-github fa-fw"></i> icepyx Github',
+            "https://github.com/icesat2py/icepyx",
+        ),
+        (
+            '<i class="fa fa-comments fa-fw"></i> Pangeo Discourse',
+            "https://discourse.pangeo.io/t/icepyx-python-tools-for-icesat-2-data/404/2",
+        ),
+    ],
 }
 
+
 def setup(app):
     app.add_stylesheet("style.css")

icepyx/__init__.py

@@ -1 +1 @@
-from .core import icesat2data
+from .core import icesat2data