chore: blacken (#375)

diff --git a/.flake8 b/.flake8
new file mode 100644
index 0000000..0574e0a
--- /dev/null
+++ b/.flake8
@@ -0,0 +1,8 @@
+[flake8]
+ignore = E203, E266, E501, W503
+exclude =
+  # Standard linting exemptions.
+  __pycache__,
+  .git,
+  *.pyc,
+  conf.py