Passing a C array to python using the gobject-introspection seem to have couple of issues when using pygobject-3.8.2.

Everything works fine when the array is passed as an "in" parameter. But when it is passed as either "inout" or "out" there are couple of issues with marshaling parameters in c->python as well as python->c.

1. When the length parameter is passed as inout, the length value is not read correctly (in this case the length is set to the pointer)

2. In the python->c there are again two issues:
a) A GArray is being returned when expecting C array
b) The contents in the array are encapsulated as GIArgument, instead of the original data type of the array.

The following patch addresses both issues described above:
diff --git a/pygobject/pygobject-3.8.2/gi/pygi-argument.c b/pygobject/pygobject-3.8.2/gi/pygi-argument.c
index 7de90a2..a5b7fc5 100644
--- a/pygobject/pygobject-3.8.2/gi/pygi-argument.c
+++ b/pygobject/pygobject-3.8.2/gi/pygi-argument.c
@@ -835,7 +835,12 @@ _pygi_argument_to_array (GIArgument  *arg,
                     g_arg_info_load_type (&length_arg_info, &length_type_info);
 
                     if (args != NULL) {
-                        if (!gi_argument_to_gssize (args[length_arg_pos],
+                        GIArgument *p_length_arg = args[length_arg_pos];
+                        if (g_arg_info_get_direction (&length_arg_info) != GI_DIRECTION_IN) {
+                            p_length_arg = (GIArgument *)p_length_arg->v_pointer;
+                        }
+                        
+                        if (!gi_argument_to_gssize (p_length_arg,
                                                     g_type_info_get_tag (&length_type_info),
                                                     &length))
                             return NULL;
@@ -1172,7 +1177,8 @@ _pygi_argument_from_object (PyObject   *object,
             if (g_type_info_get_tag (item_type_info) == GI_TYPE_TAG_UINT8)
                item_size = 1;
             else
-               item_size = sizeof (GIArgument);
+               item_size = _pygi_g_type_info_size (item_type_info);
+            // item_size = sizeof (GIArgument);
 
             array = g_array_sized_new (is_zero_terminated, FALSE, item_size, length);
             if (array == NULL) {
diff --git a/pygobject/pygobject-3.8.2/gi/pygi-closure.c b/pygobject/pygobject-3.8.2/gi/pygi-closure.c
index f30fa52..03e4e87 100644
--- a/pygobject/pygobject-3.8.2/gi/pygi-closure.c
+++ b/pygobject/pygobject-3.8.2/gi/pygi-closure.c
@@ -193,8 +193,14 @@ _pygi_closure_assign_pyobj_to_out_argument (gpointer out_arg, PyObject *object,
         }
 
         default:
-           *((gpointer *) out_arg) = arg.v_pointer;
-           break;
+            if (g_type_info_get_array_type (type_info) == GI_ARRAY_TYPE_C) {
+                GArray *temp = (GArray *) arg.v_pointer;
+                *((gpointer *) out_arg) = temp->data;
+                g_array_free(temp, FALSE);
+            } else {
+                *((gpointer *) out_arg) = arg.v_pointer;
+            }
+            break;
       }
 }