[Python-Dev] unittest assertRaisesRegex bug? (original) (raw)

R. David Murray rdmurray at bitdance.com
Thu Mar 20 01:45:19 CET 2014

On Wed, 19 Mar 2014 16:41:10 -0700, Thomas Wouters <thomas at python.org> wrote:

On Wed, Mar 19, 2014 at 4:13 PM, Ethan Furman <ethan at stoneleaf.us> wrote:

> On 03/19/2014 03:57 PM, Antoine Pitrou wrote: > >> On Wed, 19 Mar 2014 15:17:53 -0700 >> Ethan Furman <ethan at stoneleaf.us> wrote: >> >>> On 03/19/2014 03:13 PM, Antoine Pitrou wrote: >>> >>>> On Wed, 19 Mar 2014 14:37:42 -0700 >>>> Ethan Furman <ethan at stoneleaf.us> wrote: >>>>> During handling of the above exception, another exception occurred: >>>>> >>>>> Traceback (most recent call last): >>>>> File "/home/ethan/source/python/issue19995/Lib/test/testunicode.py", >>>>> line 1156, in testformatting >>>>> self.assertRaisesRegex(TypeError, '%c'.mod, pi), >>>>> >>>> >>>> This is certainly not the code you are showing above. >>>> >>> >>> More words, please! :) >>> >> >> I mean the line shown just above in the traceback does not match the >> code you presented at the top, and that line clearly has a missing >> regex pattern. >> > > A regex pattern can be a literal, yes? In which case > > exception -> TypeError > regex -> '%x format: an integer is required, not PsuedoFloat' > callable -> '%x'.mod > *args -> pi > **kwargs -> None > > So, unless you can point to where I've gone wrong with the above (which is > why I posted in the first place), I think we have a bug in unittest. > > Also: > > self.assertRaisesRegex(TypeError, '%x format: an integer is > required, not float','%x'.mod, 3.14), > self.assertRaisesRegex(TypeError, '%X format: an integer is > required, not float','%X'.mod, 2.11), > self.assertRaisesRegex(TypeError, '%o format: an integer is > required, not float','%o'.mod, 1.79), > > these lines all work just fine. > What Antoine is trying to tell you is that the traceback you pasted shows this: File "/home/ethan/source/python/issue19995/Lib/test/testunicode.py", line 1156, in testformatting self.assertRaisesRegex(TypeError, '%c'.mod, pi), ... which is passing '%c'.mod as the 'regex' argument. '%c'.mod is a method of a builtin type, a 'method-wrapper' object, which is why you get the error you're getting: AttributeError: 'method-wrapper' object has no attribute 'search'.

I think http://bugs.python.org/issue20145 is relevant here.

--David

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