[Python] xml.parsers.expat.ExpatError: no element found: line 1, column 0

I am trying to write a script to modify some data in XML files that I need to use for my testing purposes.

Here is a sample XML that I am picking up to modify.

<?xml version="1.0" encoding="UTF-8"?>
<Parent>
<FlexIDResponseEx xmlns="http://WWW.YYYY.com/SsIkkk">
<response>
<Header>
<Status>0</Status>
</Header>
<Result>
<InputEcho>
<Name>
<First>John</First>
<Last>Doe</Last>
</Name>
<Address>
<StreetAddress1>XX XXX XX XXXXX</StreetAddress1>
<City>XXXXXX</City>
<State>XX</State>
<Zip5>XXXXX</Zip5>
</Address>
<Age>0</Age>
<SSN>XXXXXX</SSN>
<HomePhone>XXXXXXXXX</HomePhone>
</InputEcho>
<UniqueId>XXXXX</UniqueId>
<NameAddressPhone>
<Summary>1</Summary>
<Type>P</Type>
<Status>C</Status>
</NameAddressPhone>
<VerifiedElementSummary>
<DOB>XXXXXXXX</DOB>
<DOBMatchLevel>8</DOBMatchLevel>
</VerifiedElementSummary>
<ValidElementSummary>
<SSNValid>0</SSNValid>
<SSNDeceased>0</SSNDeceased>
<PassportValid>0</PassportValid>
<AddressPOBox>0</AddressPOBox>
<AddressCMRA>1</AddressCMRA>
<SSNFoundForLexID>0</SSNFoundForLexID>
</ValidElementSummary>
<NameAddressSSNSummary>2</NameAddressSSNSummary>
<ComprehensiveVerification>
<ComprehensiveVerificationIndex>50</ComprehensiveVerificationIndex>
<RiskIndicators>
<RiskIndicator>
<RiskCode>A</RiskCode>
<Description>Null</Description>
<Sequence>1</Sequence>
</RiskIndicator>
<RiskIndicator>
<RiskCode>MS</RiskCode>
<Description>XXXXXX</Description>
<Sequence>2</Sequence>
</RiskIndicator>
<RiskIndicator>
<RiskCode>25</RiskCode>
<Description>XXXXX</Description>
<Sequence>3</Sequence>
</RiskIndicator>
<RiskIndicator>
<RiskCode>74</RiskCode>
<Description>The input phone number is associated with a different name and address</Description>
<Sequence>4</Sequence>
</RiskIndicator>
<RiskIndicator>
<RiskCode>52</RiskCode>
<Description>The input first name is not associated with input SSN</Description>
<Sequence>5</Sequence>
</RiskIndicator>
</RiskIndicators>
</ComprehensiveVerification>
<CustomComprehensiveVerification>
<ComprehensiveVerificationIndex>0</ComprehensiveVerificationIndex>
</CustomComprehensiveVerification>
<InstantIDVersion>1</InstantIDVersion>
</Result>
</response>
</FlexIDResponseEx>
</Parent>


Here is my python script I am trying to write

import os
from xml.dom.minidom import parse

fileList = []
p = os.popen('ls *JJ*',"r")

while 1:
line = p.readline()
if not line: break
fileList.append(line)

j = len(fileList)+1


for i in range(1, j):
lnFile = open(fileList, "rb")
tree = parse(lnFile)
first = tree.find('First')
first.text = 'YYYY'
Last = tree.find('Last')
Last.text = 'ZZZZ'
tree.write(fileList)
lnFile.close()


Here is the stack Trace

/Library/Frameworks/Python.framework/Versions/3.5/bin/python3.5 /Users/parser/parse.py
Traceback (most recent call last):
File "/Users/parser/pare.py", line 17, in <module>
tree = parse(lnFile)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/xml/dom/minidom.py", line 1958, in parse
return expatbuilder.parse(file)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/xml/dom/expatbuilder.py", line 913, in parse
result = builder.parseFile(file)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/xml/dom/expatbuilder.py", line 211, in parseFile
parser.Parse("", True)
xml.parsers.expat.ExpatError: no element found: line 1, column 0

Process finished with exit code 1

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