Static code analysis and corrections

utils/venv/lib/python3.6/site-packages/matplotlib/tests/test_matplotlib.py

@@ -0,0 +1,21 @@
+import matplotlib
+import matplotlib.rcsetup
+
+
+def test_use_doc_standard_backends():
+    """
+    Test that the standard backends mentioned in the docstring of
+    matplotlib.use() are the same as in matplotlib.rcsetup.
+    """
+    def parse(key):
+        backends = []
+        for line in matplotlib.use.__doc__.split(key)[1].split('\n'):
+            if not line.strip():
+                break
+            backends += [e.strip() for e in line.split(',') if e]
+        return backends
+
+    assert (set(parse('- interactive backends:\n')) ==
+            set(matplotlib.rcsetup.interactive_bk))
+    assert (set(parse('- non-interactive backends:\n')) ==
+            set(matplotlib.rcsetup.non_interactive_bk))