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SO's Google code prettify on python wrongly handles // (floor division) as a C-style comment, as noted here, even when the question is tagged .

Here is a more recent example from this SO question:

a[:len(a)//3*3]
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2  
How is March 6th 2011 "two years ago"? –  balpha Jul 5 '11 at 8:13
    
Sorry, my tired brain misread 'edited Mar 6 at 20:08'. Doh. Edited that out. –  smci Jul 5 '11 at 8:15
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marked as duplicate by ben is uǝq backwards, hims056, Martijn Pieters, Aziz Shaikh, animuson Oct 5 '13 at 16:17

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1 Answer

Because Python is a "webby" language, and code snippets in those posts tend to contain a mixture of

  • HTML
  • CSS
  • Python

The syntax highlighting mode for the all questions tagged is set to default, that is, infer.

If you wish to override it, you can add the following hint above a code block.

<!-- language: lang-py -->

Per http://stackoverflow.com/editing-help#syntax-highlighting

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I was documenting the known issue; at first glance I thought 'WTF?'. This issue was known two years ago, I assume someone at SO already filed that bug with Google Prettify, is that not so? –  smci Jul 5 '11 at 8:01
    
I mean at first glance I couldn't understand what was happening and thought the highlighting was broken. Then I did some reading on meta and found this is a known issue. Thanks Jeff. –  smci Jul 5 '11 at 8:07
    
@smci oh wait, I see. let me edit. –  Jeff Atwood Jul 5 '11 at 8:08
    
Sorry, as balpha points out, the issue was noted 5 months ago, not 2 years. –  smci Jul 5 '11 at 8:17
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Is it not better to associate html with lang-html, css with lang-css, and python with lang-py, such that the tag-based language selection causes questions tagged with any combination of these tags to continue to use default, but single-tagged questions are specific? –  Eric Aug 16 '13 at 14:37
1  
Python is not a webby language. The number of Python posts that contain HTML or CSS are minimal. –  Martijn Pieters Aug 16 '13 at 14:58
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