python tests baked into scons; h_ch needs the first char of its input string as its input

src/bindings/swig/hammer.i

@@ -8,8 +8,11 @@
 %typemap(in) uint8_t* {
   $1 = (uint8_t*)PyString_AsString($input);
  }
+%typemap(out) uint8_t* {
+  $result = PyString_FromString((char*)$1);
+ }
 #else
-  #warning no "in" typemap defined
+  #warning no uint8_t* typemaps defined
 #endif
 
  // All the include paths are relative to the build, i.e., ../../. If you need to build these manually (i.e., not with scons), keep that in mind.