python - Text replacing is not working -

i have list of integers looks like:

i = [1020 1022 .... ]

i need open xml file stored .txt , each entry includes

settings="keys1029"/> 

i need iterate through records replacing each numbers in "keys1029" list entry. instead of having:

....settings="keys1029"/> ....settings="keys1029"/> 

we have:

....settings="keys1020"/> ....settings="keys1022"/> 

so far have:

import os out =   [1020,1022] open('c:\xml1.txt') f1,open('c:\somefile.txt',"w") f2:     #somefile.txt temporary file     text = f1.read()     item in out:         text = text.replace("keys1029","keys"+str(item),1)     f2.write(text) #rename temporary file real file os.rename('c:\somefile.txt','c:\xml1.txt') 

this replacing:

....settings="keys1029"/> ....settings="keys1029"/> 

with

....settings="keys1"/> ....settings="keys1"/> 

any idea i'm doing wrong?

thank in advance,

i suggest different , more robust algorithm:

text = """ bla bla bla 1029 , 1029 bla bla bla 1029 bla bla bla 1029 , 1029 """ out = [1020,1022] cnt_repl=0 while true:     text_new = text.replace("1029", str(out[cnt_repl%(len(out))]),1)     if text_new==text: break     cnt_repl+=1     text=text_new print text 

for example text returns:

bla bla bla 1020 , 1022 bla bla bla 1020 bla bla bla 1022 , 1020