graphml2csv - "'NoneType' object has no attribute 'encode'"

[ms-transalis]

If a vertex/node in GraphML has a Key defined but no value, the Python script errors with the message:
"'NoneType' object has no attribute 'encode'".

The following Node can't be processed:

 <node id="#26:2">
      <data key="labelV">Document</data>
      <data key="searchname"/>
      <data key="sendername"/>
      <data key="startdate"/>
      <data key="deliverydate"/>
      <data key="search"/>
      <data key="documentid"/>
      <data key="id"/>
      <data key="idfrom"/>
      <data key="transmittimestamp"/>
      <data key="searchlocationcode"/>
      <data key="documentdatefrom"/>
      <data key="tagid"/>
      <data key="idto"/>
      <data key="format"/>
      <data key="deliverydateto"/>
      <data key="documenttype">Order</data>
      <data key="deliverydatefrom"/>
      <data key="receivername"/>
      <data key="filegennumber"/>
      <data key="documentdateto"/>
      <data key="senderid"/>
      <data key="enddate"/>
      <data key="receiverid"/>
      <data key="searchcode"/>
      <data key="documentnumber"/>
      <data key="documentdate"/>
      <data key="searchdeliverydate"/>
    </node>

[ms-transalis]

Fixed by changing:

GraphML2CSV.py_compat_str(encoding, data.text)

to:

GraphML2CSV.py_compat_str(encoding, data.text or "")

[krlawrence]

I'm going to reopen this as this looks like something we should fix in the tool. I don't think it is very common for a GraphML file to have a key element with no child, but given sparse data is allowed, the tool should still handle it gracefully. Thanks for highlighting the line in question @ms-transalis .