merged in master

Author: dkeeney

bindings/py/cpp_src/bindings/engine/py_Engine.cpp

@@ -395,7 +395,7 @@ namespace htm_ext
             .value("BINARY", SerializableFormat::BINARY)
             .value("PORTABLE", SerializableFormat::PORTABLE)
             .value("JSON", SerializableFormat::JSON)
-            .value("XML", ::SerializableFormat::XML)
+            .value("XML", SerializableFormat::XML)
             .export_values();
         // NOTE: Registered python regions will be serialized in BINARY (i.e. pickle) regardless of the format specified.
 

setup.py

@@ -253,6 +253,8 @@ def isMSVC_installed(ver):
   return true if ver is found.
   """
   vswhere = "C:\\Program Files (x86)\\Microsoft Visual Studio\\Installer\\vswhere.exe"
+  if not os.path.isfile(vswhere):
+    raise Exception("Visual Studio not installed.")
   output = subprocess.check_output([vswhere, "-products", "*", "-legacy", "-prerelease", "-format", "json"], universal_newlines=True)
   data = json.loads(output);
   for vs in data: