Reading XML File, Python 3

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#python 3.5.2

import re

lines = '''abcdefghijklmn
<entry colname="1" rowname="1">a</entry>
<entry morecols="5" morecolname="2" namest="2" nameend="7" rowname="1">a</entry>
<entry colname="1" morerows="9" morerowname="2">b</entry>
<entry morecols="5" morecolname="2" namest="2" nameend="7" rowname="2">b</entry>
<entry colname="1" morerows="9" morerowname="2">b</entry>
<morecols="4" morecolname="3" namest="3" nameend="7" morerows="2" morerowname="3">c</entry>
<entry colname="2" rowname="3">c</entry>
<entry colname="2" rowname="4">d</entry>
<entry morecols="1" morecolname="2" namest="2" nameend="3" morerows="2" morerowname="5">e</entry>
<entry colname="2" rowname="5">e</entry>
abcdefghijklmn'''

lines = lines.split('\n')
last_num = ""
last_index = 0
opened = False

for i, line in enumerate(lines):
	arr = re.findall(r"rowname=\"\d+", line)
	arr2 = []
	if arr:
		arr2 = arr[0].split('"')

if arr2:
		if last_num and last_num != arr2[1]:
			lines[last_index] = lines[last_index].strip() + 'TEST'
			opened = False
		else:
			opened = True

last_index = i
		last_num = arr2[1]
	else:
		if last_index:
			lines[last_index] = lines[last_index].strip() + 'TEST'
			opened = False

if opened:
	lines[last_index] = lines[last_index].strip() + 'TEST'

lines = "\n".join(lines)
print(lines)

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