diff -r b0560adec4b7 -r 5024c19ca8f0 PLCGenerator.py
--- a/PLCGenerator.py	Thu Oct 11 10:25:19 2018 +0300
+++ b/PLCGenerator.py	Thu Oct 11 12:00:40 2018 +0300
@@ -24,7 +24,6 @@
 
 
 from __future__ import absolute_import
-from types import *
 import re
 from six.moves import xrange
 
@@ -710,7 +709,7 @@
 
     def ComputeConnectionTypes(self, pou):
         body = pou.getbody()
-        if isinstance(body, ListType):
+        if isinstance(body, list):
             body = body[0]
         body_content = body.getcontent()
         body_type = body_content.getLocalTag()
@@ -943,7 +942,7 @@
 
     def ComputeProgram(self, pou):
         body = pou.getbody()
-        if isinstance(body, ListType):
+        if isinstance(body, list):
             body = body[0]
         body_content = body.getcontent()
         body_type = body_content.getLocalTag()
@@ -1051,7 +1050,7 @@
         uncomputed_index = range(len(paths))
         factorized_paths = []
         for num, path in enumerate(paths):
-            if isinstance(path, ListType):
+            if isinstance(path, list):
                 if len(path) > 1:
                     str_path = str(path[-1:])
                     same_paths.setdefault(str_path, [])
@@ -1341,7 +1340,7 @@
                         paths.append([variable, tuple(factorized_paths)])
                     else:
                         paths.append([variable] + factorized_paths)
-                elif isinstance(result[0], ListType):
+                elif isinstance(result[0], list):
                     paths.append([variable] + result[0])
                 elif result[0] is not None:
                     paths.append([variable, result[0]])
@@ -1352,7 +1351,7 @@
         return paths
 
     def ComputePaths(self, paths, first=False):
-        if isinstance(paths, TupleType):
+        if isinstance(paths, tuple):
             if None in paths:
                 return [("TRUE", ())]
             else:
@@ -1361,7 +1360,7 @@
                     return JoinList([(" OR ", ())], vars)
                 else:
                     return [("(", ())] + JoinList([(" OR ", ())], vars) + [(")", ())]
-        elif isinstance(paths, ListType):
+        elif isinstance(paths, list):
             vars = [self.ComputePaths(path) for path in paths]
             return JoinList([(" AND ", ())], vars)
         elif paths is None:
@@ -1423,7 +1422,7 @@
             if connections is not None and len(connections) == 1:
                 instanceLocalId = connections[0].getrefLocalId()
                 body = pou.getbody()
-                if isinstance(body, ListType):
+                if isinstance(body, list):
                     body = body[0]
                 return body.getcontentInstance(instanceLocalId)
         return None
@@ -1435,7 +1434,7 @@
             if connections is not None and len(connections) == 1:
                 instanceLocalId = connections[0].getrefLocalId()
                 body = pou.getbody()
-                if isinstance(body, ListType):
+                if isinstance(body, list):
                     body = body[0]
                 instances.append(body.getcontentInstance(instanceLocalId))
         return instances
@@ -1456,7 +1455,7 @@
                 if connections is not None and len(connections) == 1:
                     instanceLocalId = connections[0].getrefLocalId()
                     body = pou.getbody()
-                    if isinstance(body, ListType):
+                    if isinstance(body, list):
                         body = body[0]
                     instance = body.getcontentInstance(instanceLocalId)
                     if isinstance(instance, TransitionClass):
@@ -1490,7 +1489,7 @@
             if connections is not None and len(connections) == 1:
                 instanceLocalId = connections[0].getrefLocalId()
                 body = pou.getbody()
-                if isinstance(body, ListType):
+                if isinstance(body, list):
                     body = body[0]
                 instance = body.getcontentInstance(instanceLocalId)
                 if isinstance(instance, TransitionClass):
@@ -1515,7 +1514,7 @@
         if connections is not None and len(connections) == 1:
             stepLocalId = connections[0].getrefLocalId()
             body = pou.getbody()
-            if isinstance(body, ListType):
+            if isinstance(body, list):
                 body = body[0]
             step = body.getcontentInstance(stepLocalId)
             self.GenerateSFCStep(step, pou)
@@ -1562,7 +1561,7 @@
             if connections is not None and len(connections) == 1:
                 instanceLocalId = connections[0].getrefLocalId()
                 body = pou.getbody()
-                if isinstance(body, ListType):
+                if isinstance(body, list):
                     body = body[0]
                 instance = body.getcontentInstance(instanceLocalId)
                 if isinstance(instance, StepClass):
@@ -1617,7 +1616,7 @@
                 self.TagName = previous_tagname
             elif transitionValues["type"] == "connection":
                 body = pou.getbody()
-                if isinstance(body, ListType):
+                if isinstance(body, list):
                     body = body[0]
                 connections = transitionValues["value"].getconnections()
                 if connections is not None: