Python writing to XML and not over writing input

Question

I am attempting to create a program that will allow me to take in peoples info and then write it to an xml doc, save it, and then once the program is ran again, it will pick up from where I left off. All I am getting right now is I am overwriting the same line over and over. It shows

<person>
     <name>Users Name</name>
</person>

and that is it. I need it to do

<person>
     <name>User 1</name>
</person>

<person>
     <name>User 2</name>
</person>

So on and so on... I am still working on the code, but there is not sense in working on the code if I cannot write to it. I have tried open('person.xml','(w,r,a') and still nothing. My code is My Code

matteodv · Accepted Answer · 2016-05-06 00:30:04Z

2

Your file should be opened in append mode when you want to write something to it so that existing content doesn't get replaced.
You should change this line of code:

tree.write(open('person.xml', 'w'))

with this one (notice a instead of w):

tree.write(open('person.xml', 'a'))

r: open file in read mode
w: open file in write mode
a: open file in append mode

answered May 6, 2016 at 0:30

matteodv

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Padraic Cunningham · Accepted Answer · 2016-05-05 23:27:49Z

2

You need to append to the file just using a not overwrite:

with open("your.xml", "a") as f:
    tree.write(f)

w truncates your file data so basically you are emptying your file before you write hence you only see one entry, .

answered May 5, 2016 at 23:27

Padraic Cunningham

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1 Comment

Hoyt Over a year ago

Thank you so much! I saw this elsewhere and I couldn't figure it out, but I managed to figure it out with you code. Thank you so much! You have saved me days of head pounding!

nomadSK25 · Accepted Answer · 2023-10-01 04:35:00Z

0

This worked for me:

with open("your.xml", "ab") as f:
    tree.write(f)

I had to write 'ab' instead of 'a', and added b for binary mode.
reference: https://stackoverflow.com/a/5513856/3182598

answered Oct 1, 2023 at 4:35

nomadSK25

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