André wrote:
I have a function to replace the content of an ElementTree Element by that of another one which works using Python 2 but not with Python 3. I get an assertion error. The function is as follows:def replace_element(elem, replacement): '''replace the content of an ElementTree Element by that of another one. ''' elem.clear() elem.text = replacement.text elem.tail = replacement.tail elem.tag = replacement.tag elem.attrib = replacement.attrib elem[:] = replacement[:] The last line is problematic. For example, if I do the following program with Python2.5 ### from xml.etree import ElementTree as et a = et.Element('a') b = et.SubElement(a, 'b') c = et.Element('c') a[:] = c[:] ### nothing of note happens - however, doing the same with Python 3.1, I get the following traceback: Traceback (most recent call last): File "test.py", line 7, in <module> a[:] = c[:] File "/usr/local/py3.1/lib/python3.1/xml/etree/ElementTree.py", line 210, in __setitem__ assert iselement(element) AssertionError ====== I would gladly welcome any suggestion for writing a replace_element() function that works with Python 3.1
My guess is that you found a subtle bug in the 3.1 version of ElementTree, perhap a result of conversion. I would take a look at the noted line 210 to see whether it is 'a' or 'c' that is not passing as an element. Assuming that it is 'c', I would look at __getitem__ to see why not. Is [:] special-cased? Compare the codes for 2.5 and 3.1. Assuming it still looks like a bug, report it on the tracker using your minimal example, leaving out your function.
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