tests/wxHMI/HMI@wxglade_hmi/hmi.wxg
author Andrey Skvortsov <andrej.skvortzov@gmail.com>
Fri, 10 Aug 2018 17:45:33 +0300
changeset 2278 a3ac46366b86
parent 1691 9a42f12a973e
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))
[-------------------------------------------------------------]
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<?xml version="1.0"?>
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<!-- generated by wxGlade 0.7.2 on Tue Jun  6 12:26:48 2017 -->
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<application class="" encoding="UTF-8" for_version="2.8" header_extension=".h" indent_amount="4" indent_symbol="space" is_template="0" language="python" name="" option="0" overwrite="0" path="..py.py" source_extension=".cpp" top_window="wxglade_hmi" use_gettext="1" use_new_namespace="1">
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    <object class="Class_wxglade_hmi" name="wxglade_hmi" base="EditFrame">
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        <style>wxDEFAULT_FRAME_STYLE|wxMAXIMIZE</style>
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        <title>frame_1</title>
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        <object class="wxFlexGridSizer" name="grid_sizer_1" base="EditFlexGridSizer">
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            <hgap>0</hgap>
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            <growable_rows>0</growable_rows>
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            <rows>1</rows>
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            <growable_cols>0</growable_cols>
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            <cols>4</cols>
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            <vgap>0</vgap>
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            <object class="sizeritem">
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                <flag>wxALIGN_CENTER</flag>
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                <border>0</border>
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                <option>1</option>
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                <object class="ThreeDee" name="window_1" base="CustomWidget">
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                    <extracode># WHERE IS THAT ?\nprint "hello"\n</extracode>
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                    <arguments>
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                        <argument>$parent</argument>
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                        <argument>$id</argument>
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                    </arguments>
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                    <size>400,400</size>
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                </object>
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            </object>
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            <object class="sizeritem">
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                <flag>wxEXPAND</flag>
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                <border>0</border>
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                <option>1</option>
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                <object class="wxFlexGridSizer" name="sizer_1" base="EditFlexGridSizer">
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                    <hgap>0</hgap>
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                    <growable_rows>0</growable_rows>
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                    <rows>2</rows>
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                    <cols>1</cols>
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                    <vgap>0</vgap>
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                    <object class="sizeritem">
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                        <flag>wxEXPAND</flag>
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                        <border>0</border>
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                        <option>1</option>
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                        <object class="wxBoxSizer" name="sizer_2" base="EditBoxSizer">
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                            <orient>wxVERTICAL</orient>
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                            <object class="sizerslot" />
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                            <object class="sizerslot" />
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                            <object class="sizerslot" />
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                            <object class="sizerslot" />
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                        </object>
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                    </object>
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                    <object class="sizeritem">
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                        <flag>wxEXPAND</flag>
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                        <border>0</border>
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                        <option>1</option>
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                        <object class="wxGridSizer" name="sizer_3" base="EditGridSizer">
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                            <hgap>0</hgap>
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                            <rows>6</rows>
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                            <cols>2</cols>
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                            <vgap>0</vgap>
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                            <object class="sizerslot" />
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                            <object class="sizerslot" />
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                            <object class="sizerslot" />
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                            <object class="sizerslot" />
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                            <object class="sizerslot" />
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                            <object class="sizerslot" />
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                            <object class="sizerslot" />
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                            <object class="sizerslot" />
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                            <object class="sizerslot" />
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                            <object class="sizerslot" />
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                        </object>
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                    </object>
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                </object>
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            </object>
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            <object class="sizeritem">
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                <border>0</border>
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                <option>0</option>
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                <object class="wxToggleButton" name="DrawTestBt" base="EditToggleButton">
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                    <label>Please Draw!</label>
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                    <events>
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                        <handler event="EVT_TOGGLEBUTTON">SetPLCTestBtnGlobalVar</handler>
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                    </events>
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                </object>
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            </object>
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            <object class="sizeritem">
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                <border>0</border>
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                <option>0</option>
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                <object class="wxToggleButton" name="DrawTestBt2" base="EditToggleButton">
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                    <label>Please Draw copy!</label>
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                    <events>
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                        <handler event="EVT_TOGGLEBUTTON">SetPLCTestBtn2GlobalVar</handler>
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                    </events>
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                </object>
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            </object>
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        </object>
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    </object>
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</application>