Summary of magic methods

We can summarize the concepts we described in the previous sections in the form of a cheat sheet like the one presented as follows. For each action in Python, the magic method involved is presented, along with the concept that it represents:

Statement	Magic method	Python concept
obj[key] obj[i:j] obj[i:j:k]	__getitem__(key)	Subscriptable object
with obj: ...	__enter__ / __exit__	Context manager
for i in obj: ...	__iter__ / __next__ __len__ / __getitem__	Iterable object Sequence
obj.<attribute>	__getattr__	Dynamic attribute retrieval
obj(*args, **kwargs)	__call__(*args, **kwargs)	Callable object