Static code analysis and corrections

backend/venv/lib/python3.6/site-packages/pandas/tools/merge.py

@@ -0,0 +1,17 @@
+import warnings
+
+
+# back-compat of pseudo-public API
+def concat_wrap():
+
+    def wrapper(*args, **kwargs):
+        warnings.warn("pandas.tools.merge.concat is deprecated. "
+                      "import from the public API: "
+                      "pandas.concat instead",
+                      FutureWarning, stacklevel=3)
+        import pandas as pd
+        return pd.concat(*args, **kwargs)
+    return wrapper
+
+
+concat = concat_wrap()

backend/venv/lib/python3.6/site-packages/pandas/tools/plotting.py

@@ -0,0 +1,20 @@
+import sys
+import warnings
+
+import pandas.plotting as _plotting
+
+# back-compat of public API
+# deprecate these functions
+m = sys.modules['pandas.tools.plotting']
+for t in [t for t in dir(_plotting) if not t.startswith('_')]:
+
+    def outer(t=t):
+
+        def wrapper(*args, **kwargs):
+            warnings.warn("'pandas.tools.plotting.{t}' is deprecated, "
+                          "import 'pandas.plotting.{t}' instead.".format(t=t),
+                          FutureWarning, stacklevel=2)
+            return getattr(_plotting, t)(*args, **kwargs)
+        return wrapper
+
+    setattr(m, t, outer(t))