Fix typing bugs found by beartype

[ods]

Try pytest-beartype, as suggested by @antonagestam . Only two bugs found so far, doesn't seem enough to add it to CI.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.45%. Comparing base (256ce17) to head (a4dc676).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #993   +/-   ##
=======================================
  Coverage   95.45%   95.45%           
=======================================
  Files         112      112           
  Lines       16706    16706           
  Branches     2673     2673           
=======================================
  Hits        15946    15946           
  Misses        479      479           
  Partials      281      281           

Flag	Coverage Δ
cext	92.17% <100.00%> (ø)
integration	95.09% <100.00%> (ø)
purepy	94.91% <100.00%> (ø)
unit	46.41% <100.00%> (ø)

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[antonagestam]

Cool stuff, I hope it at least brings some confidence to the type hints 👍

[ods]

I hope it at least brings some confidence to the type hints 👍

Unfortunately it doesn't catch even simple and obvious bugs. So, I'd like to find another runtime checker.

[antonagestam]

@ods FWIW, there's also typeguard: https://github.com/agronholm/typeguard

[ods]

FWIW, there's also typeguard: https://github.com/agronholm/typeguard

Right, but the use is not as simple as "install and add command line option", as it is with beartype