[tahoe-lafs-trac-stream] [Tahoe-LAFS] #3399: Evaluate adding mypy checks to code checks

[Tahoe-LAFS]

#3399: Evaluate adding mypy checks to code checks
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     Reporter:  jaraco       |      Owner:
         Type:  enhancement  |     Status:  new
     Priority:  normal       |  Milestone:  Support Python 3
    Component:  unknown      |    Version:  n/a
   Resolution:               |   Keywords:
Launchpad Bug:               |
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Comment (by jaraco):

 After some troubleshooting, I've found that I can validate this code using
 those branches:

 {{{#!python
 from foolscap.api import RemoteInterface, IntegerConstraint,
 StringConstraint


 Number = IntegerConstraint(8) # 2**(8*8) == 16EiB ~= 18e18 ~= 18 exabytes
 Offset = Number
 ShareData = StringConstraint(None)


 class RIBucketWriter(RemoteInterface):
     """ Objects of this kind live on the server side. """
     def write(offset=Offset, data=ShareData):
         return None
 }}}

 ...which is almost verbatim the code that leads to the mypy error in
 `allmydata.interfaces`. So there's still a gap to be bridged.

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/3399#comment:10>
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