diff -r fda6c1a37662 -r f62625418bff modbus/modbus.py
--- a/modbus/modbus.py	Mon Mar 27 10:19:14 2023 +0200
+++ b/modbus/modbus.py	Fri Oct 28 12:39:15 2022 +0800
@@ -23,7 +23,7 @@
 # used in safety-critical situations without a full and competent review.
 
 
-from __future__ import absolute_import
+
 import os
 from six.moves import xrange
 
@@ -94,7 +94,7 @@
             if element["name"] == "ModbusRequest":
                 for child in element["children"]:
                     if child["name"] == "Function":
-                        list = modbus_function_dict.keys()
+                        list = list(modbus_function_dict.keys())
                         list.sort()
                         child["type"] = list
         return infos
@@ -240,7 +240,7 @@
             if element["name"] == "MemoryArea":
                 for child in element["children"]:
                     if child["name"] == "MemoryAreaType":
-                        list = modbus_memtype_dict.keys()
+                        list = list(modbus_memtype_dict.keys())
                         list.sort()
                         child["type"] = list
         return infos
@@ -618,7 +618,7 @@
                     if child["name"] == "Stop_Bits":
                         child["type"] = modbus_serial_stopbits_list
                     if child["name"] == "Parity":
-                        child["type"] = modbus_serial_parity_dict.keys()
+                        child["type"] = list(modbus_serial_parity_dict.keys())
         return infos
 
     # Return the number of (modbus library) nodes this specific RTU client will need
@@ -709,7 +709,7 @@
                     if child["name"] == "Stop_Bits":
                         child["type"] = modbus_serial_stopbits_list
                     if child["name"] == "Parity":
-                        child["type"] = modbus_serial_parity_dict.keys()
+                        child["type"] = list(modbus_serial_parity_dict.keys())
         return infos
 
     # Return the number of (modbus library) nodes this specific RTU slave will need
@@ -1026,7 +1026,7 @@
                             start_address = int(GetCTVal(subchild, 2))
                             relative_addr = absloute_address - start_address
                             # test if relative address in request specified range
-                            if relative_addr in xrange(int(GetCTVal(subchild, 1))):
+                            if relative_addr in range(int(GetCTVal(subchild, 1))):
                                 if str(iecvar["NAME"]) not in loc_vars_list:
                                     loc_vars.append("u16 *" + str(iecvar["NAME"]) + " = &server_nodes[%d].mem_area.%s[%d];" % (
                                         server_id, memarea, absloute_address))
@@ -1080,7 +1080,7 @@
                             start_address = int(GetCTVal(subchild, 2))
                             relative_addr = absloute_address - start_address
                             # test if relative address in request specified range
-                            if relative_addr in xrange(int(GetCTVal(subchild, 1))):
+                            if relative_addr in range(int(GetCTVal(subchild, 1))):
                                 if str(iecvar["NAME"]) not in loc_vars_list:
                                     loc_vars.append("u16 *" + str(iecvar["NAME"]) + " = &server_nodes[%d].mem_area.%s[%d];" % (
                                         server_id, memarea, absloute_address))
@@ -1116,7 +1116,7 @@
                         #        two numbers are always '0.0', and the first two identify the request.
                         #        In the following if, we check for this condition by checking
                         #        if there are at least 4 or more number in the location's address.
-                        if (        relative_addr in xrange(int(GetCTVal(subchild, 2)))  # condition (a) explained above
+                        if (        relative_addr in range(int(GetCTVal(subchild, 2)))  # condition (a) explained above
                             and len(iecvar["LOC"]) < 5):                                  # condition (b) explained above
                             if str(iecvar["NAME"]) not in loc_vars_list:
                                 loc_vars.append("u16 *" + str(iecvar["NAME"]) + " = &client_requests[%d].plcv_buffer[%d];" % (client_requestid, relative_addr))
@@ -1177,7 +1177,7 @@
                         #        two numbers are always '0.0', and the first two identify the request.
                         #        In the following if, we check for this condition by checking
                         #        if there are at least 4 or more number in the location's address.
-                        if (        relative_addr in xrange(int(GetCTVal(subchild, 2)))  # condition (a) explained above
+                        if (        relative_addr in range(int(GetCTVal(subchild, 2)))  # condition (a) explained above
                             and len(iecvar["LOC"]) < 5):                                  # condition (b) explained above
                             if str(iecvar["NAME"]) not in loc_vars_list:
                                 loc_vars.append(