Thanks for all repliers:
@Tony & @Cameron, I do know related stuffs about the dunder methods, and your
explanation just make it to be more clear, thank you!
@Roel, you just caught everyone here, we do miss it even though we know it and
use it regularly!
@Clara
> its both, depending on how
```python
>>> class A:
... def __init__(self):
... pass
...
>>> A.__init__
>>> a = A()
>>> a.__init__
>
```
On many books and even the official documents, it seems that many authors
prefer to call `__init__` as a "method" rather than a "function".
The book PYTHON CRASH COURSE mentioned
