Add Python testcase for testing flatstaticmethod syntax

For testing legacy flattened static method access for when
issue #2137 is applied.

Examples/test-suite/python/python_flatstaticmethod_runme.py

@@ -0,0 +1,85 @@
+from python_flatstaticmethod import *
+import inspect
+
+# This testcase tests C++ class static functions when using legacy "flattened"
+# staticmethod access, A_bar, as well as the normal staticmethod access, A.bar.
+
+
+def check(got, expected):
+    if got != expected:
+        raise RuntimeError("\ngot :{}\nwant:{}\n".format(got, expected))
+
+if A_bar(2) != 4:
+    raise RuntimeError
+
+if A.bar(2) != 4:
+    raise RuntimeError
+
+# %callback
+if foobar(3, A_bar) != A_bar(3):
+    raise RuntimeError
+
+if foobar(3, A.bar) != A_bar(3):
+    raise RuntimeError
+
+# kwargs
+if A_pub() != 1:
+    raise RuntimeError
+
+if A_pub(b=2) != 3:
+    raise RuntimeError
+
+if A_pub(b=10,a=20) != 30:
+    raise RuntimeError
+
+if A.pub() != 1:
+    raise RuntimeError
+
+if A.pub(b=2) != 3:
+    raise RuntimeError
+
+if A.pub(b=10,a=20) != 30:
+    raise RuntimeError
+
+check(inspect.getdoc(A_func0static),
+    "A_func0static(e, arg2, hello, f=2) -> int")
+check(inspect.getdoc(A_func1static),
+    "A_func1static(A e, short arg2, Tuple hello, double f=2) -> int")
+
+# overloaded static functions
+if A_over(3) != "over:int":
+    raise RuntimeError("A::over(int)")
+
+if A_over(3.0) != "over:double":
+    raise RuntimeError("A::over(double)")
+
+if A_over("hello") != "over:char *":
+    raise RuntimeError("A::over(char *)")
+
+if A.over(3) != "over:int":
+    raise RuntimeError("A::over(int)")
+
+if A.over(3.0) != "over:double":
+    raise RuntimeError("A::over(double)")
+
+if A.over("hello") != "over:char *":
+    raise RuntimeError("A::over(char *)")
+
+# default args
+if A_defargs() != 30:
+    raise RuntimeError
+
+if A_defargs(1) != 21:
+    raise RuntimeError
+
+if A_defargs(1, 2) != 3:
+    raise RuntimeError
+
+if A.defargs() != 30:
+    raise RuntimeError
+
+if A.defargs(1) != 21:
+    raise RuntimeError
+
+if A.defargs(1, 2) != 3:
+    raise RuntimeError