add new code metrics and pycon videos link

mattmakai · mattmakai · commit 408bd8ff7b52 · 2019-05-13T09:02:37.000-04:00
diff --git a/content/pages/01-introduction/09-best-python-videos.markdown b/content/pages/01-introduction/09-best-python-videos.markdown
@@ -163,6 +163,7 @@ like [PyCon US](https://us.pycon.org/) and
   Python language.
 
 * PyCon US videos from 
+  [2019](https://www.youtube.com/channel/UCxs2IIVXaEHHA4BtTiWZ2mQ/videos),
   [2018](https://www.youtube.com/channel/UCsX05-2sVSH7Nx3zuk3NYuQ/videos),
   [2017](https://www.youtube.com/channel/UCrJhliKNQ8g0qoE_zvL8eVg/videos),
   [2016](https://www.youtube.com/channel/UCwTD5zJbsQGJN75MwbykYNw/videos),
diff --git a/content/pages/04-web-development/39-code-metrics.markdown b/content/pages/04-web-development/39-code-metrics.markdown
@@ -145,3 +145,7 @@ diminishing returns.
   covers how to use Black and add it as a pre-commit hook in Git to
   ensure consistency in repository updates.
 
+* [Format Python however you like with Black](https://opensource.com/article/19/5/python-black)
+  is a super short introduction on what Black does to keep your code
+  formatting consistent.
+
