diff -r ba5f64fe0e00 -r d73b64672238 plcopen/plcopen.py
--- a/plcopen/plcopen.py	Wed Aug 16 12:30:31 2017 +0300
+++ b/plcopen/plcopen.py	Wed Aug 16 12:48:08 2017 +0300
@@ -152,6 +152,7 @@
 def TextMatched(str1, str2):
     return str1 and str2 and (str1.upper() == str2.upper())
 
+
 PLCOpenParser = GenerateParserFromXSD(paths.AbsNeighbourFile(__file__, "tc6_xml_v201.xsd"))
 PLCOpen_XPath = lambda xpath: etree.XPath(xpath, namespaces=PLCOpenParser.NSMAP)
 
@@ -188,6 +189,7 @@
   </body>
 </pou>""" % locals()
 
+
 PLCOpen_v1_file = open(paths.AbsNeighbourFile(__file__, "TC6_XML_V10_B.xsd"))
 PLCOpen_v1_xml = PLCOpen_v1_file.read()
 PLCOpen_v1_file.close()
@@ -289,6 +291,7 @@
     project_file.close()
     return LoadProjectXML(project_xml)
 
+
 project_pou_xpath = PLCOpen_XPath("/ppx:project/ppx:types/ppx:pous/ppx:pou")
 
 
@@ -296,6 +299,7 @@
     root, error = LoadProjectXML(LOAD_POU_PROJECT_TEMPLATE % xml_string)
     return project_pou_xpath(root)[0], error
 
+
 project_pou_instances_xpath = {
     body_type: PLCOpen_XPath(
         "/ppx:project/ppx:types/ppx:pous/ppx:pou[@name='paste_pou']/ppx:body/ppx:%s/*" % body_type)
@@ -317,6 +321,7 @@
         encoding='utf-8'))
     project_file.close()
 
+
 cls = PLCOpenParser.GetElementClass("formattedText")
 if cls:
     def updateElementName(self, old_name, new_name):
@@ -712,6 +717,7 @@
             var_number += 1
     return search_result
 
+
 cls = PLCOpenParser.GetElementClass("configuration", "configurations")
 if cls:
 
@@ -968,6 +974,7 @@
 def _updateBaseTypeElementName(self, old_name, new_name):
     self.baseType.updateElementName(old_name, new_name)
 
+
 cls = PLCOpenParser.GetElementClass("dataType", "dataTypes")
 if cls:
     setattr(cls, "updateElementName", _updateBaseTypeElementName)
@@ -1043,6 +1050,7 @@
                                  criteria, parent_infos))
     return search_result
 
+
 cls = PLCOpenParser.GetElementClass("subrangeSigned", "dataType")
 if cls:
     setattr(cls, "updateElementName", _updateBaseTypeElementName)
@@ -1077,6 +1085,7 @@
         return type_content.getname()
     return type_content_type.upper()
 
+
 cls = PLCOpenParser.GetElementClass("pou", "pous")
 if cls:
 
@@ -1926,6 +1935,7 @@
 def _SearchInElement(self, criteria, parent_infos=[]):
     return []
 
+
 _connectionsFunctions = {
     "bbox": {"none": _getBoundingBox,
              "single": _getBoundingBoxSingle,
@@ -1958,6 +1968,7 @@
         setattr(cls, "Search", _SearchInElement)
     return cls
 
+
 cls = _initElementClass("comment", "commonObjects")
 if cls:
     def setcontentText(self, text):
@@ -2044,6 +2055,7 @@
         return _Search([("reference", self.variable)], criteria, parent_infos + [ld_element_type, self.getlocalId()])
     return SearchInLDElement
 
+
 cls = _initElementClass("contact", "ldObjects", "single")
 if cls:
     setattr(cls, "updateElementName", _UpdateLDElementName)
@@ -2310,6 +2322,7 @@
 def _UpdateIOElementAddress(self, address_model, new_leading):
     self.expression = update_address(self.expression, address_model, new_leading)
 
+
 cls = _initElementClass("inVariable", "fbdObjects")
 if cls:
     setattr(cls, "updateElementName", _UpdateIOElementName)
@@ -2332,6 +2345,7 @@
 def _SearchInConnector(self, criteria, parent_infos=[]):
     return _Search([("name", self.getname())], criteria, parent_infos + ["connector", self.getlocalId()])
 
+
 cls = _initElementClass("continuation", "commonObjects")
 if cls:
     setattr(cls, "Search", _SearchInConnector)
@@ -2495,6 +2509,7 @@
             raise ValueError, _("\"%s\" is an invalid value!") % value
     return items
 
+
 cls = PLCOpenParser.GetElementClass("arrayValue", "value")
 if cls:
     arrayValue_model = re.compile("([0-9]+)\((.*)\)$")