Python edit xml file

Just find the nodes and change tag:

from xml.etree import ElementTree as et

x="""<?xml version="1.0" encoding="windows-1250"?>
<MoneyData ICAgendy="46501401" KodAgendy="" HospRokOd="2016-01-01" HospRokDo="2016-12-31" description="všetky skladové doklady" ExpZkratka="_S" ExpDate="2016-05-19" ExpTime="00:01:00" VyberZaznamu="0"><SeznamDLPrij><DLPrij><CisloDokla>DLP16010</CisloDokla><KPFromOdb>0</KPFromOdb><Datum>2016-05-19</Datum><SouhrnDPH><Zaklad0>0</Zaklad0><Zaklad5>0</Zaklad5><Zaklad22>18.03</Zaklad22><DPH5>0</DPH5><DPH22>3.61</DPH22></SouhrnDPH><Celkem>21.64</Celkem><DRada>DLPrr</DRada><Vystavil>Filip Kotian</Vystavil><Nadpis>Dodací list</Nadpis><PorizCena>18.03</PorizCena><PopisX>Easy-Fix rám na hodváb 94 x 94 cm</PopisX><Fiskal>0</Fiskal><FisDoklad>0</FisDoklad><DatSkPoh>2016-05-19</DatSkPoh><SazbaDPH1>10</SazbaDPH1><SazbaDPH2>20</SazbaDPH2><DodOdb><ObchNazev>Čarovné farby s.r.o.</ObchNazev><ObchAdresa><Ulice>Montážna 15</Ulice><Misto>Prievidza</Misto><PSC>97104</PSC><Stat>Slovensko</Stat><KodStatu>SK</KodStatu></ObchAdresa><FaktNazev>Čarovné farby s.r.o.</FaktNazev><FaktAdresa><Ulice>Montážna 15</Ulice><Misto>Prievidza</Misto><PSC>97104</PSC><Stat>Slovensko</Stat><KodStatu>SK</KodStatu></FaktAdresa><ICO>50232240</ICO><DIC>SK2120235865</DIC><GUID>{FB837366-4B25-4E71-BB0E-856F60DDA187}</GUID><Nazev>Čarovné farby s.r.o.</Nazev><PlatceDPH>1</PlatceDPH><FyzOsoba>0</FyzOsoba><DICSK>2120235865</DICSK></DodOdb><DopravTuz>0</DopravTuz><DopravZahr>0</DopravZahr><Sleva>0</Sleva><Polozka><Nazev>Easy-Fix rám na hodváb 94 x 94 cm</Nazev><PocetMJ>1</PocetMJ><Cena>18.03</Cena><Valuty>0</Valuty><DPH>20</DPH><CenaTyp>0</CenaTyp><Sleva>0</Sleva><Vratka>0</Vratka><UcetMD>000000</UcetMD><UcetD>000000</UcetD><Hmotnost>0</Hmotnost><PorizCena>18.03</PorizCena><CenaPoSleve>1</CenaPoSleve><Sklad><Nazev>Pebeo</Nazev><KodSkladu>pebeo</KodSkladu><GUID>{786852E7-1ED4-4547-A941-C8F3320E726D}</GUID><CenikSklad>0</CenikSklad></Sklad><KmKarta><Popis>Easy-Fix rám na hodváb 94 x 94 cm</Popis><MJ>ks</MJ><GUID>{403D74BD-935B-4486-8A56-71272CB215CD}</GUID><Katalog>ASF1</Katalog><TypZarDoby>N</TypZarDoby><ZarDoba>0</ZarDoba><DesMist>0</DesMist><Obrazek>P:\ASF1.jpg</Obrazek><Hmotnost>0</Hmotnost><Objem>0</Objem><TypKarty>jednoducha</TypKarty></KmKarta></Polozka><MojeFirma><Nazev>creActive s.r.o.</Nazev><Adresa><Ulice>SNP 634/52</Ulice><Misto>Jalovec</Misto><PSC>97231</PSC><Stat>Slovensko</Stat><KodStatu>SK</KodStatu></Adresa><ObchNazev>creActive s.r.o.</ObchNazev><ObchAdresa><Ulice>SNP 634/52</Ulice><Misto>Jalovec</Misto><PSC>97231</PSC><Stat>Slovensko</Stat><KodStatu>SK</KodStatu></ObchAdresa><FaktNazev>creActive s.r.o.</FaktNazev><FaktAdresa><Ulice>SNP 634/52</Ulice><Misto>Jalovec</Misto><PSC>97231</PSC><Stat>Slovensko</Stat><KodStatu>SK</KodStatu></FaktAdresa><Tel><Pred></Pred><Cislo></Cislo><Klap></Klap></Tel><Fax><Pred></Pred><Cislo></Cislo><Klap></Klap></Fax><Mobil><Pred></Pred><Cislo>0915818465</Cislo></Mobil><EMail>[email protected]</EMail><WWW>www.creActive.sk</WWW><ICO>46501401</ICO><DIC>SK2023486278</DIC><DanIC>2023486278</DanIC><Banka>Fio banka, a.s., pobočka zahraničnej banky</Banka><Ucet>2500373646</Ucet><KodBanky>8330</KodBanky><KodPartn></KodPartn><FyzOsoba>0</FyzOsoba><MenaSymb>€</MenaSymb><MenaKod>EUR</MenaKod></MojeFirma></DLPrij></SeznamDLPrij></MoneyData>"""


tree = et.fromstring(x)

for node in tree.findall(".//DLPrij"):
    node.tag = "DLVyd"

print et.tostring(tree)

So to parse from a file and create the new output file:

from xml.etree import ElementTree as et


tree = et.parse("/volume1/Temp/DLPrij.xml ")

for node in tree.findall(".//DLPrij"):
    node.tag = "DLVyd"
tree.write('/volume1/Temp/DLVyd.xml')

To add the encoding you just need to specify in write:

tree.write('/volume1/Temp/DLVyd.xml',encoding="windows-1250")

To change the node text for the KPFromOdb nodes if it is equal to 0:

for node in tree.findall(".//DLPrij"):
    node.tag = "DLVyd"
for node in tree.findall(".//KPFromOdb"):
    if node.text == "0":
        node.text = "1"

Then again just write:

tree.write('/volume1/Temp/DLVyd.xml',encoding="windows-1250")

If you plan on doing a lot of work with xml then lxml would be worth installing and using, xml has limited xpath support but lxml has comprehensive support and it is very efficient. The same code using lxml:

import lxml.etree as et
tree = et.parse("in.xml")

for node in tree.xpath("//DLPrij"):
    node.tag = "DLVyd"
for node in tree.xpath("//KPFromOdb[text()='0']"):
        node.text = "1"
tree.write("new.xml", encoding="windows-1250")