Parsing XML using Python library

I am trying to create a Python script to create a table according to the policy number in the XML file. Just a background, there is a policy which has children as composite key etc. So there are different composite keys in the file i want to increment whenever there is a actioncode A and Decrement whenever there is actioncode of D. So i came with the following script.

import xml.etree.ElementTree as ET
f = open('delta-stats.txt','w')
tree = ET.parse('tester.xml')
root = tree.getroot()
dict = { }
countI=0
for party in root.findall('party'):
  if(party[0].text == 'A'):
    if party.findall('.//roleCode')[0].text == 'I':
      countI= countI+1
  if(party[0].text == 'D'):
    if party.findall('.//roleCode')[0].text == 'I':
      countI= countI-1
print(party.find('./compositeKey/collectionOfficeCode').text +',' + party.find('./compositeKey/policyNumber').text + ',' +  str(countI))    
f.close()

So now my problem with the code is how would i distinguish between the different polices and increment the counter according.

Current output is

0804,9876543210,2

Expected output

0804,1876543210,1
0804,9876543210,2

Here is the XML:

<parties>
<!-- Father Brown - Bene -->
<party>
    <actionCode>A</actionCode>

    <compositeKey>
        <collectionOfficeCode>0804</collectionOfficeCode>
        <coverageCode></coverageCode>
        <coverageTypeDescription></coverageTypeDescription>
        <customerID></customerID>
        <employeeNumber></employeeNumber>
        <groupNumber></groupNumber>
        <policyNumber>1876543210</policyNumber>
        <policySuffixCode></policySuffixCode>
    </compositeKey>

    <birthDayNumber>01</birthDayNumber>
    <birthMonthNumber>04</birthMonthNumber>
    <birthYearNumber>1983</birthYearNumber>
    <birthdate>1983-04-01 00:00:00.0</birthdate>

    <contactMethod>
        <contact>
            <addressLineOne>MetLife Alico</addressLineOne>
            <addressLineThree>23 Main Street</addressLineThree>
            <addressLineTwo>Suite 300E</addressLineTwo>
            <addressTypeDescription>Home</addressTypeDescription>
            <cityName>Athens</cityName>
            <countryName>GREECE</countryName>
            <stateCode></stateCode>
            <typeDescription>ADDRESS</typeDescription>
            <zipCode>09740</zipCode>
            <addressMatchCode>V1</addressMatchCode>
        </contact>
        <contact>
            <telephoneCountryNumber>0030</telephoneCountryNumber>
            <telephoneAreaNumber>555</telephoneAreaNumber>
            <telephonePartialNumber>888888888</telephonePartialNumber>
            <telephoneTypeDescription>Mobile</telephoneTypeDescription>
            <telephoneExtensionNumber></telephoneExtensionNumber>
            <typeDescription>PHONE</typeDescription>
        </contact>
        <contact>
            <emailAddressLine>father@metlife.com</emailAddressLine>
            <preferredEmailAddressIndicator>Y</preferredEmailAddressIndicator>
            <typeDescription>EMAIL</typeDescription>
        </contact>
    </contactMethod>

    <employerIDNumber></employerIDNumber>
    <employerIDNumberFirstFive></employerIDNumberFirstFive>
    <employerIDNumberLastFour></employerIDNumberLastFour>

    <firstName>Dad</firstName>
    <rootFirstName>Father</rootFirstName>
    <generationOfName>Sr.</generationOfName>
    <lastName>Brown</lastName>
    <middleOneName></middleOneName>
    <rootMiddleName></rootMiddleName>
    <rootOrganizationName></rootOrganizationName>
    <suffixOfName></suffixOfName>

    <policyRoles>
        <policyRole>
            <ownerRoleDescription></ownerRoleDescription>
            <roleCode>B</roleCode>
            <roleDescription>Beneficiary</roleDescription>
        </policyRole>
    </policyRoles>

    <organizationEstablishedDate></organizationEstablishedDate>

    <riders>
    </riders>

    <taxID>333333333</taxID>
    <taxIDFirstFive>33333</taxIDFirstFive>
    <taxIDLastFour>3333</taxIDLastFour>

    <typeCode>I</typeCode>

</party>