Support matrix multiplication (@) #705

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1. JukkaL

   added

   feature

   on Jun 3, 2015
2. gilesc commented on Oct 14, 2016

   

   gilesc

   on Oct 14, 2016

   More actions

   Was this fixed? I am using mypy v0.4.5 installed via pip3 (just getting started) and I get errors when using this feature. I haven't even started annotating anything yet.

   I run mypy --python-version=3.5 -p mypackage, and get lots of errors like the following:

   mypackage/distance.py: note: In function "nearest_neighbors":
   mypackage/distance.py:57: error: Parse error before @
   

   And the line referred to is:

   r = Xa[:,j] @ Xa / (Xa.shape[0] - 1)

   Since I use this feature heavily I get tons of such errors.
3. gvanrossum

   added

   crash

   on Oct 14, 2016
4. gvanrossum commented on Oct 14, 2016

   

   gvanrossum

   on Oct 14, 2016

   Member

   More actions

   Yeah, the default parser doesn't support that. We're moving to a new parser, which you can invoke with --fast-parser. Unfortunately that leads to raise RuntimeError('mypy does not support the MatMult operator') which becomes a crash, so it's just as bad. We'll have to fix this. Thanks for noticing!
5. gvanrossum

   added this to the 0.5This milestone has been deleted milestone on Oct 14, 2016
6. gvanrossum

   closed this as completedin #2287on Oct 20, 2016
7. gvanrossum

   added a commit that references this issue on Oct 20, 2016

   Support matrix multiplication operator (@) (#2287)

   ...

   This issue will close once commit 48fa2ef is merged into the 'master' branch.

   48fa2ef