annoying doctest problem

Ned Batchelder ned at
Mon Jan 12 16:47:25 CET 2015

On 1/11/15 11:20 PM, gordianknot1981 at wrote:
> It failed with an unknown reason that evaluate two expected equal value but got an unexpected result! I'm struggling with this problem for a long time. Did I did something wrong? And how do I to fix it?
> any help is appreciated. :)

My recommendation is to use doctest to test the code samples that 
naturally occur in your docstrings, but not to use it as a 
general-purpose testing tool.  It has too many limitations and quirks, 
and if you're going to write separate test methods anyway, why not just 
write actual code?

More detail here:

Ned Batchelder,

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