beremiz: NativeLib.xml@a3ac46366b86

Dirty fix for error '_object_has_no_attribute_'getSlave' in EtherCAT extension

traceback:
File "/home/developer/WorkData/PLC/beremiz/beremiz/IDEFrame.py", line 1433, in OnPouSelectedChanged
window.RefreshView()
File "/home/developer/WorkData/PLC/beremiz/beremiz/etherlab/ConfigEditor.py", line 837, in RefreshView
self.RefreshProcessVariables()
File "/home/developer/WorkData/PLC/beremiz/beremiz/etherlab/ConfigEditor.py", line 886, in RefreshProcessVariables
slaves = self.Controler.GetSlaves(**self.CurrentNodesFilter)
File "/home/developer/WorkData/PLC/beremiz/beremiz/etherlab/EthercatMaster.py", line 341, in GetSlaves
for slave in self.Config.getConfig().getSlave():
<type 'exceptions.AttributeError'>:_'lxml.etree._Element'_object_has_no_attribute_'getSlave'

Steps to reproduce problem:

- Add new EtherCAT master
- Add new EthercatNode to the master
- double click on

this is looks like dirty hack to fix strange problem with initial[0]
changing its type after returning from _init_ method to lxml.etree._Element
As a result all methods generated by class factory are lost.

For example, in function initMethod initial[0].__class__ points to
xmlclass.xmlclass.Config. After map(self.append, initial)
self.Config.__class__ is 'xmlclass.xmlclass.Config' as well.
But after returning from initMethod (_init) in CreateElement
self.Config.__class__ has changed to lxml.etree._Element.

I've noticed similar behavior if copy/deepcopy is used for any child
of etree.ElementBase. See simple example below.
[-------------------------------------------------------------]
#!/usr/bin/python

from __future__ import print_function
from lxml import etree
import copy

class DefaultElementClass(etree.ElementBase):
def getLocalTag(self):
return etree.QName(self.tag).localname

def printInformation(x):
print(x, x.__class__, "getLocalTag" in dir(x))

a = DefaultElementClass()
printInformation(a)

#
printInformation(copy.copy(a))
printInformation(copy.deepcopy(a))
[-------------------------------------------------------------]

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://www.plcopen.org/xml/tc6.xsd"
         xsi:schemaLocation="http://www.plcopen.org/xml/tc6.xsd"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns:xhtml="http://www.w3.org/1999/xhtml">
  <fileHeader companyName="Unknown"
              productName="Unnamed"
              productVersion="1"
              creationDateTime="2013-01-29T14:01:00"/>
  <contentHeader name="Unnamed"
                 modificationDateTime="2013-02-26T15:59:13">
    <coordinateInfo>
      <fbd>
        <scaling x="0" y="0"/>
      </fbd>
      <ld>
        <scaling x="0" y="0"/>
      </ld>
      <sfc>
        <scaling x="0" y="0"/>
      </sfc>
    </coordinateInfo>
  </contentHeader>
  <types>
    <dataTypes>
      <dataType name="LOGLEVEL">
        <baseType>
          <enum>
            <values>
              <value name="CRITICAL"/>
              <value name="WARNING"/>
              <value name="INFO"/>
              <value name="DEBUG"/>
            </values>
          </enum>
        </baseType>
        <initialValue>
          <simpleValue value="INFO"/>
        </initialValue>
      </dataType>
    </dataTypes>
    <pous>
      <pou name="LOGGER" pouType="functionBlock">
        <interface>
          <inputVars>
            <variable name="TRIG">
              <type>
                <BOOL/>
              </type>
            </variable>
            <variable name="MSG">
              <type>
                <string/>
              </type>
            </variable>
            <variable name="LEVEL">
              <type>
                <derived name="LOGLEVEL"/>
              </type>
              <initialValue>
                <simpleValue value="INFO"/>
              </initialValue>
            </variable>
          </inputVars>
          <localVars>
            <variable name="TRIG0">
              <type>
                <BOOL/>
              </type>
            </variable>
          </localVars>
        </interface>
        <body>
          <ST>
<![CDATA[IF TRIG AND NOT TRIG0 THEN
{{
 LogMessage(GetFbVar(LEVEL),(char*)GetFbVar(MSG, .body),GetFbVar(MSG, .len));
}}
END_IF;
TRIG0:=TRIG;
]]>
          </ST>
        </body>
      </pou>
    </pous>
  </types>
  <instances>
    <configurations/>
  </instances>
</project>

author	Andrey Skvortsov <andrej.skvortzov@gmail.com>
	Fri, 10 Aug 2018 17:45:33 +0300
changeset 2278	a3ac46366b86
parent 1050	56bef276055e
permissions	-rw-r--r--