[issue24312] miniDOM._write_data() give a vague error message when the argument isn't of type str

[Oz Tamir]

Oz Tamir added the comment:

I created a patch that will raise a TypeError when _write_data() has recvived 
an argument that is not a str.

I found this exception and the error message it provide to be more straight 
forward and helpful when encountering this error.

--
keywords: +patch
Added file: http://bugs.python.org/file39529/issue24312.patch

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[issue24312] miniDOM._write_data() give a vague error message when the argument isn't of type str

[Oz Tamir]

New submission from Oz Tamir:

In Python 3.3, 3.4 and on 3.6.0a0 (default:dfe62f685538) the following snippet:

>>> from xml.dom.minidom import getDOMImplementation
>>> doc = getDOMImplementation().createDocument(None, 'Issues Tracker', None)
>>> tracker = doc.documentElement
>>> new_issue = doc.createElement('issue')
>>> new_issue.setAttribute('id', 10)
>>> tracker.appendChild(new_issue)
>>> with open('file.xml', 'w') as f:
... doc.writexml(f, addindent='\t', newl='\n')


will produce the following exception:
[Traceback]
AttributeError: 'int' object has no attribute 'replace'

which I found to be vague and rather confusing.

--
components: XML
messages: 244283
nosy: oz.tamir
priority: normal
severity: normal
status: open
title: miniDOM._write_data() give a vague error message when the argument isn't 
of type str
type: behavior
versions: Python 3.3, Python 3.4, Python 3.6

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