py: Make globals and locals proper dictionary objects.

Finishes addressing issue #424.

In the end this was a very neat refactor that now makes things a lot
more consistent across the py code base.  It allowed some
simplifications in certain places, now that everything is a dict object.

Also converted builtins tables to dictionaries.  This will be useful
when we need to turn builtins into a proper module.

1 files changed, 2 insertions, 2 deletions

diff --git a/py/objfun.c b/py/objfun.c
index d006c8715..0b0df3ba4 100644
--- a/py/objfun.c
+++ b/py/objfun.c
@@ -152,7 +152,7 @@ mp_obj_t mp_make_function_var_between(int n_args_min, int n_args_max, mp_fun_var
 
 typedef struct _mp_obj_fun_bc_t {
     mp_obj_base_t base;
-    mp_map_t *globals;      // the context within which this function was defined
+    mp_obj_dict_t *globals; // the context within which this function was defined
     machine_uint_t n_args : 15;         // number of arguments this function takes
     machine_uint_t n_def_args : 15;     // number of default arguments
     machine_uint_t takes_var_args : 1;  // set if this function takes variable args
@@ -326,7 +326,7 @@ continue2:;
         }
     }
 
-    mp_map_t *old_globals = mp_globals_get();
+    mp_obj_dict_t *old_globals = mp_globals_get();
     mp_globals_set(self->globals);
     mp_obj_t result;
     DEBUG_printf("Calling: args=%p, n_args=%d, extra_args=%p, n_extra_args=%d\n", args, n_args, extra_args, n_extra_args);