diff --git a/bindings/CMakeLists.txt b/bindings/CMakeLists.txt
index 9488bdd9b..a982ff68d 100644
--- a/bindings/CMakeLists.txt
+++ b/bindings/CMakeLists.txt
@@ -1,13 +1,13 @@
 find_package(Python COMPONENTS Development Interpreter)
 
-if (NOT Python_FOUND)
+if(NOT Python_FOUND)
   return()
 endif()
 
-find_package(SWIG 4.2.1 COMPONENTS python)
+find_package(SWIG 4.3.0 COMPONENTS python)
 include(UseSWIG)
 
-if (NOT SWIG_FOUND)
+if(NOT SWIG_FOUND)
   return()
 endif()
 
@@ -16,18 +16,16 @@ include_directories(${CMAKE_SOURCE_DIR}/bindings ${Python_INCLUDE_DIRS})
 set_property(SOURCE wex.i PROPERTY CPLUSPLUS ON)
 set_property(SOURCE wex.i PROPERTY SWIG_FLAGS -std=c++23)
 
-swig_add_library(${PROJECT_NAME} 
-  TYPE SHARED 
-  LANGUAGE python 
-  SOURCES wex.i)
-  
+swig_add_library(${PROJECT_NAME} TYPE SHARED LANGUAGE python SOURCES wex.i)
+
 wex_target_link_all()
-  
-if (APPLE)
-  set(SWIG_FILES
+
+if(APPLE)
+  set(
+    SWIG_FILES
     ${CMAKE_CURRENT_BINARY_DIR}/wex.py
-    ${CMAKE_CURRENT_BINARY_DIR}/_wex.dylib)
+    ${CMAKE_CURRENT_BINARY_DIR}/_wex.dylib
+  )
 
-  install(FILES ${SWIG_FILES}
-    DESTINATION ${Python_SITELIB})
-endif ()
+  install(FILES ${SWIG_FILES} DESTINATION ${Python_SITELIB})
+endif()
diff --git a/bindings/wex.i b/bindings/wex.i
index 290e8336a..c7322dba8 100644
--- a/bindings/wex.i
+++ b/bindings/wex.i
@@ -5,6 +5,7 @@
 // Copyright: (c) 2023-2024 Anton van Wezenbeek
 ////////////////////////////////////////////////////////////////////////////////
 
+%include <std_filesystem.i>
 %include <std_pair.i>
 %include <std_sstream.i>
 %include <std_string.i>
@@ -15,9 +16,12 @@
 
 %module wex
 %{
+#include <wex/common/wex.h>
 #include <wex/core/wex.h>
+#include <wex/factory/wex.h>
 %}
 
+%include "../include/wex/core/app.h"
 %include "../include/wex/core/chrono.h"
 %include "../include/wex/core/core.h"
 %include "../include/wex/core/file-status.h"
@@ -26,4 +30,10 @@
 %include "../include/wex/core/queue-thread.h"
 %include "../include/wex/core/regex.h"
 %include "../include/wex/core/regex-part.h"
+%include "../include/wex/core/tokenize.h"
+%include "../include/wex/core/types.h"
 %include "../include/wex/core/version.h"
+
+%include "../include/wex/factory/sort.h"
+
+%include "../include/wex/common/statistics.h"
diff --git a/include/wex/common/statistics.h b/include/wex/common/statistics.h
index 30cead80a..ad42de05b 100644
--- a/include/wex/common/statistics.h
+++ b/include/wex/common/statistics.h
@@ -2,7 +2,7 @@
 // Name:      statistics.h
 // Purpose:   Include file for class wex::statistics
 // Author:    Anton van Wezenbeek
-// Copyright: (c) 2021 Anton van Wezenbeek
+// Copyright: (c) 2021-2024 Anton van Wezenbeek
 ////////////////////////////////////////////////////////////////////////////////
 
 #pragma once
@@ -93,7 +93,7 @@ template <class T> class statistics
   };
 
   /// Returns the items.
-  const auto& get_items() const { return m_items; }
+  const std::map<std::string, T>& get_items() const { return m_items; }
 
   /// Increments key with value.
   const T inc(const std::string& key, T inc_value = 1)
diff --git a/include/wex/factory/sort.h b/include/wex/factory/sort.h
index fe1a68346..fe4842512 100644
--- a/include/wex/factory/sort.h
+++ b/include/wex/factory/sort.h
@@ -2,7 +2,7 @@
 // Name:      sort.h
 // Purpose:   Declaration of wex::sort class
 // Author:    Anton van Wezenbeek
-// Copyright: (c) 2021-2023 Anton van Wezenbeek
+// Copyright: (c) 2021-2024 Anton van Wezenbeek
 ////////////////////////////////////////////////////////////////////////////////
 
 #pragma once
@@ -46,7 +46,7 @@ class sort
   const std::string string(
     /// text to sort
     const std::string& input,
-    /// characters to split lines
+    /// characters to tokenize the input
     const std::string& separators);
 
 private:
diff --git a/src/factory/sort.cpp b/src/factory/sort.cpp
index dfcb6cb52..1486b0947 100644
--- a/src/factory/sort.cpp
+++ b/src/factory/sort.cpp
@@ -2,7 +2,7 @@
 // Name:      sort.cpp
 // Purpose:   Implementation of wex::sort class
 // Author:    Anton van Wezenbeek
-// Copyright: (c) 2021-2023 Anton van Wezenbeek
+// Copyright: (c) 2021-2024 Anton van Wezenbeek
 ////////////////////////////////////////////////////////////////////////////////
 
 #include <boost/algorithm/string.hpp>
@@ -153,12 +153,6 @@ bool wex::factory::sort::selection_other(factory::stc* stc)
 const std::string
 wex::factory::sort::string(const std::string& input, const std::string& sep)
 {
-  if (!std::all_of(sep.begin(), sep.end(), isspace))
-  {
-    log("sort::string separator should contain whitespace only") << sep;
-    return input;
-  }
-
   // Empty lines are not kept after sorting, as they are used as separator.
   std::map<std::string, std::string>      m;
   std::multimap<std::string, std::string> mm;
@@ -182,9 +176,13 @@ wex::factory::sort::string(const std::string& input, const std::string& sep)
     if (m_len == std::string::npos)
     {
       if (m_sort_t[SORT_UNIQUE])
+      {
         m.insert({key, line});
+      }
       else
+      {
         mm.insert({key, line});
+      }
     }
     else
     {