Fixed problem with the Python build

src/item.cc

@@ -338,13 +338,10 @@ namespace {
   }
 
   value_t get_seq(item_t& item) {
-    return item.pos ? long(item.pos->sequence) : 0L;
+    return long(item.seq());
   }
   value_t get_id(item_t& item) {
-    if (optional<value_t> ref = item.get_tag(_("UUID")))
-      return *ref;
-    else
-      return item.pos ? long(item.pos->sequence) : 0L;
+    return string_value(item.id());
   }
 
   value_t get_addr(item_t& item) {

src/item.h

@@ -151,6 +151,19 @@ public:
     return ! (*this == xact);
   }
 
+  string id() const {
+    if (optional<value_t> ref = get_tag(_("UUID"))) {
+      return ref->to_string();
+    } else {
+      std::ostringstream buf;
+      buf << seq();
+      return buf.str();
+    }
+  }
+  std::size_t seq() const {
+    return pos ? pos->sequence : 0L;
+  }
+
   virtual bool has_tag(const string& tag,
                        bool          inherit = true) const;
   virtual bool has_tag(const mask_t&           tag_mask,

src/py_post.cc

@@ -132,6 +132,9 @@ void export_post()
   class_< post_t, bases<item_t> > ("Posting")
     //.def(init<account_t *>())
 
+    .def("id", &post_t::id)
+    .def("seq", &post_t::seq)
+
     .add_property("xact",
                   make_getter(&post_t::xact,
                               return_internal_reference<>()),

src/py_xact.cc

@@ -107,6 +107,9 @@ void export_xact()
     ;
 
   class_< xact_t, bases<xact_base_t> > ("Transaction")
+    .def("id", &xact_t::id)
+    .def("seq", &xact_t::seq)
+
     .add_property("code",
                   make_getter(&xact_t::code),
                   make_setter(&xact_t::code))
@@ -117,8 +120,6 @@ void export_xact()
     .def("add_post", &xact_t::add_post, with_custodian_and_ward<1, 2>())
 
     .def("magnitude", &xact_t::magnitude)
-    .def("idstring", &xact_t::idstring)
-    .def("id", &xact_t::id)
 
     .def("lookup", &xact_t::lookup)