lint: fix bare except and unused variables

.yamllint

@@ -0,0 +1,17 @@
+extends: default
+
+rules:
+  comments:
+    min-spaces-from-content: 1
+  comments-indentation: false
+  document-start: disable
+  line-length: disable
+  braces:
+    min-spaces-inside: 0
+    max-spaces-inside: 1
+  brackets:
+    min-spaces-inside: 0
+    max-spaces-inside: 1
+  indentation:
+    spaces: 2
+    indent-sequences: consistent