PrettifyTreeprocessor AttributeError · Issue #1261 · Python-Markdown/markdown (original) (raw)

This code section near the bottom of markdown.treeprocessors raises AttributeError if pre[0].text is None.

Clean up extra empty lines at end of code blocks.

pres = root.iter('pre') for pre in pres: if len(pre) and pre[0].tag == 'code': pre[0].text = util.AtomicString(pre[0].text.rstrip() + '\n')

The check should be if len(pre) and pre[0].tag == 'code' and pre[0].text is not None or isinstance(pre[0].text, str), but that may be too strict.

I encountered this with a custom Block/Inline processor. The band-aid fix was just to ensure these elements had text.

for pre in root.iter("pre"): if pre[0].text is None: pre[0].text = ""