Boris Borcic a écrit :
Given the ABC innovation, maybe an infix syntax for isinstance() would
be good.
Possibilities :
- stealing "is" away from object identity. As a motivation, true use
cases for testing object identity are rare;
"x is None" is a *very* common test. Using a _marker object as default
arg value when you want to accept None as a meaningfull value is pretty
common. Testing a class identity often happens when writing metaclasses.
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