code: def setUp(self):
      string = """<ANALYSISNOTEBOOK NAME="Notebook.Cancer Example From Neapolitan" ROOT="Cancer">
                         <BNMODEL NAME="Cancer">
                            <STATICPROPERTIES>
                               <FORMAT VALUE="MSR DTAS XML"/>
                               <VERSION VALUE="0.2"/>
                               <CREATOR VALUE="Microsoft Research DTAS"/>
                            </STATICPROPERTIES>
                            <VARIABLES>
                               <VAR NAME="a" TYPE="discrete" XPOS="13495" YPOS="10465">
                                  <DESCRIPTION>(a) Metastatic Cancer</DESCRIPTION>
                                  <STATENAME>Present</STATENAME>
                                  <STATENAME>Absent</STATENAME>
                               </VAR>
                               <VAR NAME="b" TYPE="discrete" XPOS="11290" YPOS="11965">
                                  <DESCRIPTION>(b) Serum Calcium Increase</DESCRIPTION>
                                  <STATENAME>Present</STATENAME>
                                  <STATENAME>Absent</STATENAME>
                               </VAR>
                               <VAR NAME="c" TYPE="discrete" XPOS="15250" YPOS="11935">
                                  <DESCRIPTION>(c) Brain Tumor</DESCRIPTION>
                                  <STATENAME>Present</STATENAME>
                                  <STATENAME>Absent</STATENAME>
                               </VAR>
                               <VAR NAME="d" TYPE="discrete" XPOS="13960" YPOS="12985">
                                  <DESCRIPTION>(d) Coma</DESCRIPTION>
                                  <STATENAME>Present</STATENAME>
                                  <STATENAME>Absent</STATENAME>
                               </VAR>
                               <VAR NAME="e" TYPE="discrete" XPOS="17305" YPOS="13240">
                                  <DESCRIPTION>(e) Papilledema</DESCRIPTION>
                                  <STATENAME>Present</STATENAME>
                                  <STATENAME>Absent</STATENAME>
                               </VAR>
                               <VAR NAME="f" TYPE="discrete" XPOS="13440" YPOS="10489">
                                  <DESCRIPTION>(f) Asthma</DESCRIPTION>
                                  <STATENAME>Present</STATENAME>
                                  <STATENAME>Absent</STATENAME>
                               </VAR>
                            </VARIABLES>
                            <STRUCTURE>
                               <ARC PARENT="a" CHILD="b"/>
                               <ARC PARENT="a" CHILD="c"/>
                               <ARC PARENT="b" CHILD="d"/>
                               <ARC PARENT="c" CHILD="d"/>
                               <ARC PARENT="c" CHILD="e"/>
                            </STRUCTURE>
                            <DISTRIBUTIONS>
                               <DIST TYPE="discrete">
                                  <PRIVATE NAME="a"/>
                                  <DPIS>
                                     <DPI> 0.2 0.8</DPI>
                                  </DPIS>
                               </DIST>
                               <DIST TYPE="discrete">
                                  <CONDSET>
                                     <CONDELEM NAME="a"/>
                                  </CONDSET>
                                  <PRIVATE NAME="b"/>
                                  <DPIS>
                                     <DPI INDEXES=" 0 "> 0.8 0.2</DPI>
                                     <DPI INDEXES=" 1 "> 0.2 0.8</DPI>
                                  </DPIS>
                               </DIST>
                               <DIST TYPE="discrete">
                                  <CONDSET>
                                     <CONDELEM NAME="a"/>
                                  </CONDSET>
                                  <PRIVATE NAME="c"/>
                                  <DPIS>
                                     <DPI INDEXES=" 0 "> 0.2 0.8</DPI>
                                     <DPI INDEXES=" 1 "> 0.05 0.95</DPI>
                                  </DPIS>
                               </DIST>
                               <DIST TYPE="discrete">
                                  <CONDSET>
                                     <CONDELEM NAME="b"/>
                                     <CONDELEM NAME="c"/>
                                  </CONDSET>
                                  <PRIVATE NAME="d"/>
                                  <DPIS>
                                     <DPI INDEXES=" 0 0 "> 0.8 0.2</DPI>
                                     <DPI INDEXES=" 0 1 "> 0.9 0.1</DPI>
                                     <DPI INDEXES=" 1 0 "> 0.7 0.3</DPI>
                                     <DPI INDEXES=" 1 1 "> 0.05 0.95</DPI>
                                  </DPIS>
                               </DIST>
                               <DIST TYPE="discrete">
                                  <CONDSET>
                                     <CONDELEM NAME="c"/>
                                  </CONDSET>
                                  <PRIVATE NAME="e"/>
                                  <DPIS>
                                     <DPI INDEXES=" 0 "> 0.8 0.2</DPI>
                                     <DPI INDEXES=" 1 "> 0.6 0.4</DPI>
                                  </DPIS>
                               </DIST>
                               <DIST TYPE="discrete">
                                  <PRIVATE NAME="f"/>
                                  <DPIS>
                                     <DPI> 0.3 0.7</DPI>
                                  </DPIS>
                               </DIST>
                            </DISTRIBUTIONS>
                         </BNMODEL>
                      </ANALYSISNOTEBOOK>"""
  
      self.reader_string = XMLBeliefNetwork.XBNReader(string=string)
      self.reader_file = XMLBeliefNetwork.XBNReader(
          path=io.StringIO(string)
      )
  
imports: import io
  import sys
  import unittest
  import xml.etree.ElementTree
  import networkx
  import numpy
  import numpy.testing
  from pgmpy.factors.discrete import TabularCPD
  from pgmpy.models import BayesianNetwork
  from pgmpy.readwrite import XMLBeliefNetwork
label_desc: Use image node_id 1 for calling the TestXBNReader obj's underlying member method code with example usage: obj.setUp() without return types