CODEWITHSUNDEEP
pythonxml-parsingxsd
Hocine Ben
Hocine Ben

Reputation: 2279

cElementTree.ParseError: multiple elements on top level

I have this python code that accepts as input an XML file. When I run the execution, I get the error indicated in the title of the question:

for event,element in cElementTree.iterparse(io, events = ( b'start',b'end')):
    if event == b'start':
        self.TreeBuilder.start(element.tag, element.attrib)

error:

> File "/usr/lib/python2.7/site-packages/pymzml/run.py", line 370, in
> __init__
>     self.TreeBuilder.start(element.tag, element.attrib) 
      cElementTree.ParseError: multiple elements on top level

help me to solve this problem! thank you.

Upvotes: 0

Views: 1845

Answers (1)

David K. Hess
David K. Hess

Reputation: 17246

If I'm guessing correctly, it appears you are parsing an XML fragment with multiple root nodes while TreeBuilder is expecting a rooted document.

Try wrapping your parsing with calls to create a tree with a single root node. In other words:

self.TreeBuilder.start("root", {})
[...]
for event,element in cElementTree.iterparse(io, events = ( b'start',b'end')):
    if event == b'start':
        self.TreeBuilder.start(element.tag, element.attrib)
[...]
self.TreeBuilder.end("root")

Just remember that the resulting DOM has this extra element at the top and modify your processing to take that into account.

Upvotes: 1

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