Currently there is no way to set the string fields of a GtkStockItem through python as the introspection API does not support memory management of string fields. See: http://developer.gnome.org/gi/stable/gi-GIFieldInfo.html#g-field-info-set-field

A method for creating a GtkStockItem would help resolve this issue at least for GtkStockItems. Something along the lines of:


/**
 * gtk_stock_item_create:
 * @stock_id: a stock item name
 * @label: user-visible label
 * @modifier: keyboard accelerator modifier key
 * @keyval: keyboard accelerator
 * @translation_domain: translation domain of the menu or toolbar item
 * 
 * Creates a new stock item with the given fields.
 * 
 * Return value: a new #GtkStockItem
 **/
GtkStockItem *
gtk_stock_item_new(const gchar *stock_id,
                   const gchar *label,
                   GdkModifierType modifier,
                   guint keyval,
                   const gchar *translation_domain);