flake8 config

.flake8

@@ -0,0 +1,18 @@
+[flake8]
+max-line-length = 125
+
+## IGNORES
+
+# E126: yapf conflicts with "continuation line over-indented for hanging indent"
+
+# E127: flake8 reporting incorrect continuation line indent errors
+# on multi-line and multi-level indents
+
+# W503: flake8 reports this as incorrect, and scripts/format_code
+# changes code to it, so let format_code win.
+
+ignore = E126,E127,W503
+
+exclude =
+    docs/build
+    .tox