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canfestival/test_config/master.od
author Andrey Skvortsov <andrej.skvortzov@gmail.com>
Fri, 10 Aug 2018 17:45:33 +0300
changeset 2278 a3ac46366b86
parent 721 ecf4d203c4d4
permissions -rw-r--r--
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"?>
<!DOCTYPE PyObject SYSTEM "PyObjects.dtd">
<PyObject module="node" class="Node" id="148584620">
<attr name="Profile" type="dict" id="148589396" >
</attr>
<attr name="Description" type="string" value="" />
<attr name="Dictionary" type="dict" id="148592132" >
  <entry>
    <key type="numeric" value="4096" />
    <val type="numeric" value="302" />
  </entry>
  <entry>
    <key type="numeric" value="4097" />
    <val type="numeric" value="0" />
  </entry>
  <entry>
    <key type="numeric" value="6144" />
    <val type="list" id="148585004" >
      <item type="string" value="{True:&quot;$NODEID+0x%X80&quot;%(base+1),False:0x80000000}[base&lt;4]" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
    </val>
  </entry>
  <entry>
    <key type="numeric" value="5120" />
    <val type="list" id="148586060" >
      <item type="numeric" value="448" />
      <item type="numeric" value="1" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
    </val>
  </entry>
  <entry>
    <key type="numeric" value="4101" />
    <val type="numeric" value="1073741952" />
  </entry>
  <entry>
    <key type="numeric" value="4102" />
    <val type="numeric" value="50000" />
  </entry>
  <entry>
    <key type="numeric" value="8192" />
    <val type="numeric" value="0" />
  </entry>
  <entry>
    <key type="numeric" value="6656" />
    <val type="list" id="148585228" >
      <item type="numeric" value="268501000" />
    </val>
  </entry>
  <entry>
    <key type="numeric" value="5632" />
    <val type="list" id="148585036" >
      <item type="numeric" value="536870920" />
    </val>
  </entry>
  <entry>
    <key type="numeric" value="4120" />
    <val type="list" id="148585292" >
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
    </val>
  </entry>
  <entry>
    <key type="numeric" value="4118" />
    <val type="list" id="148585100" >
      <item type="numeric" value="4195804" />
    </val>
  </entry>
</attr>
<attr name="SpecificMenu" type="list" id="148584044" >
</attr>
<attr name="ParamsDictionary" type="dict" id="148592268" >
</attr>
<attr name="UserMapping" type="dict" id="148592404" >
  <entry>
    <key type="numeric" value="8192" />
    <val type="dict" id="148592540" >
      <entry>
        <key type="string" value="need" />
        <val type="False" value="" />
      </entry>
      <entry>
        <key type="string" value="values" />
        <val type="list" id="148585868" >
          <item type="dict" id="148592676" >
            <entry>
              <key type="string" value="access" />
              <val type="string" value="rw" />
            </entry>
            <entry>
              <key type="string" value="pdo" />
              <val type="True" value="" />
            </entry>
            <entry>
              <key type="string" value="type" />
              <val type="numeric" value="5" />
            </entry>
            <entry>
              <key type="string" value="name" />
              <val type="string">Read Inputs</val>
            </entry>
          </item>
        </val>
      </entry>
      <entry>
        <key type="string" value="name" />
        <val type="string">Read Inputs</val>
      </entry>
      <entry>
        <key type="string" value="struct" />
        <val type="numeric" value="1" />
      </entry>
    </val>
  </entry>
</attr>
<attr name="DS302" type="dict" id="148592812" >
  <entry>
    <key type="numeric" value="7968" />
    <val type="dict" id="148592948" >
      <entry>
        <key type="string" value="need" />
        <val type="False" value="" />
      </entry>
      <entry>
        <key type="string" value="values" />
        <val type="list" id="148584684" >
          <item type="dict" id="148593084" >
            <entry>
              <key type="string" value="access" />
              <val type="string" value="ro" />
            </entry>
            <entry>
              <key type="string" value="pdo" />
              <val type="False" value="" />
            </entry>
            <entry>
              <key type="string" value="type" />
              <val type="numeric" value="5" />
            </entry>
            <entry>
              <key type="string" value="name" />
              <val type="string" value="Number of Entries" />
            </entry>
          </item>
          <item type="dict" id="148593220" >
            <entry>
              <key type="string" value="access" />
              <val type="string" value="rw" />
            </entry>
            <entry>
              <key type="string" value="pdo" />
              <val type="False" value="" />
            </entry>
            <entry>
              <key type="string" value="type" />
              <val type="numeric" value="15" />
            </entry>
            <entry>
              <key type="string" value="name" />
              <val type="string" value="Store DCF for node %d[(sub)]" />
            </entry>
            <entry>
              <key type="string" value="nbmax" />
              <val type="numeric" value="127" />
            </entry>
          </item>
        </val>
      </entry>
      <entry>
        <key type="string" value="name" />
        <val type="string" value="Store DCF" />
      </entry>
      <entry>
        <key type="string" value="struct" />
        <val type="numeric" value="7" />
      </entry>
    </val>
  </entry>
  <entry>
    <key type="numeric" value="7969" />
    <val type="dict" id="148593356" >
      <entry>
        <key type="string" value="need" />
        <val type="False" value="" />
      </entry>
      <entry>
        <key type="string" value="values" />
        <val type="list" id="148585516" >
          <item type="dict" id="148593492" >
            <entry>
              <key type="string" value="access" />
              <val type="string" value="ro" />
            </entry>
            <entry>
              <key type="string" value="pdo" />
              <val type="False" value="" />
            </entry>
            <entry>
              <key type="string" value="type" />
              <val type="numeric" value="5" />
            </entry>
            <entry>
              <key type="string" value="name" />
              <val type="string" value="Number of Entries" />
            </entry>
          </item>
          <item type="dict" id="148593628" >
            <entry>
              <key type="string" value="access" />
              <val type="string" value="rw" />
            </entry>
            <entry>
              <key type="string" value="pdo" />
              <val type="False" value="" />
            </entry>
            <entry>
              <key type="string" value="type" />
              <val type="numeric" value="2" />
            </entry>
            <entry>
              <key type="string" value="name" />
              <val type="string" value="Storage Format for Node %d[(sub)]" />
            </entry>
            <entry>
              <key type="string" value="nbmax" />
              <val type="numeric" value="127" />
            </entry>
          </item>
        </val>
      </entry>
      <entry>
        <key type="string" value="name" />
        <val type="string" value="Storage Format" />
      </entry>
      <entry>
        <key type="string" value="struct" />
        <val type="numeric" value="7" />
      </entry>
    </val>
  </entry>
  <entry>
    <key type="numeric" value="7970" />
    <val type="dict" id="148593764" >
      <entry>
        <key type="string" value="need" />
        <val type="False" value="" />
      </entry>
      <entry>
        <key type="string" value="values" />
        <val type="list" id="148594956" >
          <item type="dict" id="148593900" >
            <entry>
              <key type="string" value="access" />
              <val type="string" value="ro" />
            </entry>
            <entry>
              <key type="string" value="pdo" />
              <val type="False" value="" />
            </entry>
            <entry>
              <key type="string" value="type" />
              <val type="numeric" value="5" />
            </entry>
            <entry>
              <key type="string" value="name" />
              <val type="string" value="Number of Entries" />
            </entry>
          </item>
          <item type="dict" id="148594036" >
            <entry>
              <key type="string" value="access" />
              <val type="string" value="rw" />
            </entry>
            <entry>
              <key type="string" value="pdo" />
              <val type="False" value="" />
            </entry>
            <entry>
              <key type="string" value="type" />
              <val type="numeric" value="15" />
            </entry>
            <entry>
              <key type="string" value="name" />
              <val type="string" value="Concise DCF for Node %d[(sub)]" />
            </entry>
            <entry>
              <key type="string" value="nbmax" />
              <val type="numeric" value="127" />
            </entry>
          </item>
        </val>
      </entry>
      <entry>
        <key type="string" value="name" />
        <val type="string" value="Concise DCF" />
      </entry>
      <entry>
        <key type="string" value="struct" />
        <val type="numeric" value="7" />
      </entry>
    </val>
  </entry>
</attr>
<attr name="ProfileName" type="string" value="None" />
<attr name="Type" type="string">master</attr>
<attr name="ID" type="numeric" value="0" />
<attr name="Name" type="string">TestMaster</attr>
</PyObject>
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