If Inheritance is so bad, why does everyone use it?
Alloy Workshop There are still two slots available for the alloy workshop! I've been hard at work adding a bunch of teaching innovations to the class, which...
Source: buttondown.email
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Crimes with Python's Pattern Matching • Hillel Wayne
Let's make the CPython team regret adding pattern matching to Python!
Source: hillelwayne.com
Python Negatypes • Hillel Wayne
Back in 2007 Python added Abstract Base Classes, which were intended to be used as interfaces: from abc import ABC class AbstractIterable(ABC): @abstractmethod def __iter__(self): while False: yield None def get_iterator(self): return self.__iter__() ABCs were added to strengthen the duck typing a little. If you inherited AbstractIterable, then everybody knew you had an implemented __iter__ method, and could handle that appropriately. Unsurprisingly, this idea never caught on. People instead prefered “better ask forgiveness than permission” and wrapped calls to __iter__ in a try b...
Source: hillelwayne.com