特殊メソッド

オブジェクト系

メソッド	意味
`object.__new__(cls[, ...])`
`object.__init__(self[, ...])`
`object.__del__(self)`

データ変換系

メソッド	意味
`object.__repr__(self)`
`object.__str__(self)`
`object.__bytes__(self)`
`object.__format__(self, format_spec)`
`object.__bool__(self)`

拡張比較 (rich comparison)

メソッド	意味
`object.__lt__(self, other)`	`self < other`
`object.__le__(self, other)`	`self <= other`
`object.__eq__(self, other)`	`self == other`
`object.__ne__(self, other)`	`self != other`
`object.__gt__(self, other)`	`self > other`
`object.__ge__(self, other)`	`self >= other`
`object.__hash__(self)`
`object.__bool__(self)`

属性値アクセスの書き換え

メソッド	意味
`object.__getattr__(self, name)`
`object.__getattribute__(self, name)`
`object.__delattr__(self, name)`
`object.__dir__(self)`

デスクリプタ (descriptor)

メソッド	意味
`object.__get__(self, instance, owner)`
`object.__set__(self, instance, value)`
`object.__delete__(self, instance)`

数値型のエミュレーション

メソッド	意味
`object.__add__(self, other)`	二項算術演算 `+`
`object.__sub__(self, other)`	二項算術演算 `-`
`object.__mul__(self, other)`	二項算術演算 `*`
`object.__truediv__(self, other)`	二項算術演算 `/`
`object.__floordiv__(self, other)`	二項算術演算 `//`
`object.__mod__(self, other)`	二項算術演算 `%`
`object.__divmod__(self, other)`	二項算術演算 `divmod()`
`object.__pow__(self, other[, modulo])`	二項算術演算 `**`, `pow()`
`object.__lshift__(self, other)`	二項算術演算 `<<`
`object.__rshift__(self, other)`	二項算術演算 `>>`
`object.__and__(self, other)`	二項算術演算 `&`
`object.__xor__(self, other)`	二項算術演算 `^`
`object.__or__(self, other)`	二項算術演算 `\|`
`object.__neg__(self)`	単項演算 `-`
`object.__pos__(self)`	単項演算 `+`
`object.__abs__(self)`	単項演算 `abs()`
`object.__invert__(self)`	単項演算 `~`
`object.__complex__(self)`	組み込み関数 `complex()`
`object.__int__(self)`	組み込み関数 `int()`
`object.__float__(self)`	組み込み関数 `float()`
`object.__round__(self[, n])`	組み込み関数 `round()`

コレクション型のエミュレーション

メソッド	意味
`object.__len__(self)`
`object.__length_hint__(self)`
`object.__missing__(self, key)`
`object.__setitem__(self, key, value)`
`object.__delitem__(self, key)`
`object.__iter__(self)`
`object.__reversed__(self)`
`object.__contains__(self, item)`

参考資料