chore: add blacken to template (#96)

Source-Author: Leah E. Cole <6719667+leahecole@users.noreply.github.com>
Source-Date: Thu Nov 5 15:22:03 2020 -0800
Source-Repo: googleapis/synthtool
Source-Sha: 1f1148d3c7a7a52f0c98077f976bd9b3c948ee2b
Source-Link: googleapis/synthtool@1f1148d

Co-authored-by: Tim Swast <swast@google.com>

Author: yoshi-automation

bigquery_storage/quickstart/noxfile.py

@@ -147,6 +147,19 @@ def lint(session):
     session.run("flake8", *args)
 
 
+#
+# Black
+#
+
+
+@nox.session
+def blacken(session):
+    session.install("black")
+    python_files = [path for path in os.listdir(".") if path.endswith(".py")]
+
+    session.run("black", *python_files)
+
+
 #
 # Sample Tests
 #

bigquery_storage/to_dataframe/noxfile.py

@@ -147,6 +147,19 @@ def lint(session):
     session.run("flake8", *args)
 
 
+#
+# Black
+#
+
+
+@nox.session
+def blacken(session):
+    session.install("black")
+    python_files = [path for path in os.listdir(".") if path.endswith(".py")]
+
+    session.run("black", *python_files)
+
+
 #
 # Sample Tests
 #