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tests/canopen_slave/canopen@canfestival/slave@CanOpenSlave/slave.od
author Andrey Skvortsov <andrej.skvortzov@gmail.com>
Fri, 10 Aug 2018 17:45:33 +0300
changeset 2278 a3ac46366b86
parent 411 8261c8f1e365
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="157806348">
<attr name="Profile" type="dict" id="157588716" >
</attr>
<attr name="Description" type="string" value="" />
<attr name="Dictionary" type="dict" id="157588580" >
  <entry>
    <key type="numeric" value="4096" />
    <val type="numeric" value="0" />
  </entry>
  <entry>
    <key type="numeric" value="4097" />
    <val type="numeric" value="0" />
  </entry>
  <entry>
    <key type="numeric" value="5122" />
    <val type="list" id="160478380" >
      <item type="string" value="{True:&quot;$NODEID+0x%X00&quot;%(base+2),False:0x80000000}[base&lt;4]" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
    </val>
  </entry>
  <entry>
    <key type="numeric" value="5123" />
    <val type="list" id="158303244" >
      <item type="string" value="{True:&quot;$NODEID+0x%X00&quot;%(base+2),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="8192" />
    <val type="numeric" value="0" />
  </entry>
  <entry>
    <key type="numeric" value="8193" />
    <val type="numeric" value="0" />
  </entry>
  <entry>
    <key type="numeric" value="5634" />
    <val type="list" id="158305356" >
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <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="5635" />
    <val type="list" id="158305388" >
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <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="6146" />
    <val type="list" id="158305420" >
      <item type="string" value="{True:&quot;$NODEID+0x%X80&quot;%(base+1),False:0x80000000}[base&lt;4]" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
    </val>
  </entry>
  <entry>
    <key type="numeric" value="6658" />
    <val type="list" id="158305932" >
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
    </val>
  </entry>
  <entry>
    <key type="numeric" value="6147" />
    <val type="list" id="158305516" >
      <item type="string" value="{True:&quot;$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="4608" />
    <val type="list" id="158305068" >
      <item type="string" value="&quot;$NODEID+0x600&quot;" />
      <item type="string" value="&quot;$NODEID+0x580&quot;" />
    </val>
  </entry>
  <entry>
    <key type="numeric" value="4120" />
    <val type="list" id="158304940" >
      <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="158051500" >
      <item type="string" value="{True:&quot;$NODEID+0x%X00&quot;%(base+2),False:0x80000000}[base&lt;4]" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
    </val>
  </entry>
  <entry>
    <key type="numeric" value="6659" />
    <val type="list" id="158052300" >
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
    </val>
  </entry>
  <entry>
    <key type="numeric" value="5632" />
    <val type="list" id="158049740" >
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
    </val>
  </entry>
  <entry>
    <key type="numeric" value="5121" />
    <val type="list" id="158048716" >
      <item type="string" value="{True:&quot;$NODEID+0x%X00&quot;%(base+2),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="6144" />
    <val type="list" id="158048428" >
      <item type="string" value="{True:&quot;$NODEID+0x%X80&quot;%(base+1),False:0x80000000}[base&lt;4]" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
    </val>
  </entry>
  <entry>
    <key type="numeric" value="5633" />
    <val type="list" id="158052172" >
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
    </val>
  </entry>
  <entry>
    <key type="numeric" value="6656" />
    <val type="list" id="158052204" >
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
    </val>
  </entry>
  <entry>
    <key type="numeric" value="6145" />
    <val type="list" id="158052108" >
      <item type="string" value="{True:&quot;$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="6657" />
    <val type="list" id="158048588" >
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
    </val>
  </entry>
</attr>
<attr name="SpecificMenu" type="list" id="158048396" >
</attr>
<attr name="ParamsDictionary" type="dict" id="157588308" >
</attr>
<attr name="UserMapping" type="dict" id="157588852" >
  <entry>
    <key type="numeric" value="8192" />
    <val type="dict" id="157602516" >
      <entry>
        <key type="string" value="need" />
        <val type="False" value="" />
      </entry>
      <entry>
        <key type="string" value="values" />
        <val type="list" id="158052332" >
          <item type="dict" id="157586676" >
            <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="3" />
            </entry>
            <entry>
              <key type="string" value="name" />
              <val type="string">OutVar</val>
            </entry>
          </item>
        </val>
      </entry>
      <entry>
        <key type="string" value="name" />
        <val type="string">OutVar</val>
      </entry>
      <entry>
        <key type="string" value="struct" />
        <val type="numeric" value="1" />
      </entry>
    </val>
  </entry>
  <entry>
    <key type="numeric" value="8193" />
    <val type="dict" id="157535468" >
      <entry>
        <key type="string" value="need" />
        <val type="False" value="" />
      </entry>
      <entry>
        <key type="string" value="values" />
        <val type="list" id="158305004" >
          <item type="dict" id="158343620" >
            <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="3" />
            </entry>
            <entry>
              <key type="string" value="name" />
              <val type="string">InVar</val>
            </entry>
          </item>
        </val>
      </entry>
      <entry>
        <key type="string" value="name" />
        <val type="string">InVar</val>
      </entry>
      <entry>
        <key type="string" value="struct" />
        <val type="numeric" value="1" />
      </entry>
    </val>
  </entry>
</attr>
<attr name="DS302" type="dict" id="158328188" >
</attr>
<attr name="ProfileName" type="string" value="None" />
<attr name="Type" type="string" value="slave" />
<attr name="ID" type="numeric" value="0" />
<attr name="Name" type="string" value="SlaveNode" />
</PyObject>
beremiz