Static code analysis and corrections

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

@@ -0,0 +1,30 @@
+import matplotlib.pyplot as plt
+
+
+def test_stem_remove():
+    ax = plt.gca()
+    st = ax.stem([1, 2], [1, 2])
+    st.remove()
+
+
+def test_errorbar_remove():
+
+    # Regression test for a bug that caused remove to fail when using
+    # fmt='none'
+
+    ax = plt.gca()
+
+    eb = ax.errorbar([1], [1])
+    eb.remove()
+
+    eb = ax.errorbar([1], [1], xerr=1)
+    eb.remove()
+
+    eb = ax.errorbar([1], [1], yerr=2)
+    eb.remove()
+
+    eb = ax.errorbar([1], [1], xerr=[2], yerr=2)
+    eb.remove()
+
+    eb = ax.errorbar([1], [1], fmt='none')
+    eb.remove()