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⇤ ← Revision 1 as of 2023-01-07 05:38:21
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| See the specification for [[Python/ContextManager|context managers]]. |
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| See the specification for [[Python/ContextManager|context managers]]. |
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| == __GetAttr__ == When attempting to access an object's attributes, conventionally an `AttributeError` will be raised if the lookup fails. To customize this behavior, a custom `__getattr__()` implementation can be set. This hooks into all attribute lookups that fail. {{{ class Codes(object): def __getattr__(self, attr: str) -> str: return attr }}} ---- |
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To override the attribute lookup process entirely for an object, a custom `__getattribute__()` implementation can be set. {{{ class ObfuscatedData(object): def __getattribute__(self, attr: str) -> str: return 'REDACTED' }}} |
Python Dunder Method
Contents
-
Python Dunder Method
- __Abs__
- __Add__
- __AEnter__
- __AExit__
- __And__
- __Bool__
- __Ceil__
- __Class__
- __Del__
- __DelAttr__
- __DelItem__
- __Dir__
- __DivMod__
- __Doc__
- __Enter__
- __Eq__
- __Exit__
- __Float__
- __Floor__
- __FloorDiv__
- __Format__
- __Ge__
- __GetAttr__
- __GetAttribute__
- __GetItem__
- __GetNewArgs__
- __Gt__
- __Hash__
- __Index__
- __Init__
- __Init_Subclass__
- __Int__
- __Invert__
- __Le__
- __Len__
- __LShift__
- __Lt__
- __Mod__
- __Mul__
- __Ne__
- __Neg__
- __New__
- __Or__
- __Pos__
- __Pow__
- __RAdd__
- __RAnd__
- __RDivMod__
- __Reduce__
- __Reduce_Ex__
- __Repr__
- __RFloorDiv__
- __RLShift__
- __RMod__
- __RMul__
- __ROr__
- __Round__
- __RPow__
- __RRShift__
- __RShift__
- __RSub__
- __RTrueDiv__
- __RXor__
- __SetItem__
- __SizeOf__
- __Str__
- __Sub__
- __SubclassHook__
- __TrueDiv__
- __Trunc__
- __Xor__
__Abs__
__Add__
__AEnter__
See the specification for context managers.
__AExit__
See the specification for context managers.
__And__
__Bool__
__Ceil__
__Class__
__Del__
__DelAttr__
__DelItem__
__Dir__
__DivMod__
__Doc__
__Enter__
See the specification for context managers.
__Eq__
__Exit__
See the specification for context managers.
__Float__
__Floor__
__FloorDiv__
__Format__
__Ge__
__GetAttr__
When attempting to access an object's attributes, conventionally an AttributeError will be raised if the lookup fails. To customize this behavior, a custom __getattr__() implementation can be set. This hooks into all attribute lookups that fail.
class Codes(object):
def __getattr__(self, attr: str) -> str:
return attr
__GetAttribute__
To override the attribute lookup process entirely for an object, a custom __getattribute__() implementation can be set.
class ObfuscatedData(object):
def __getattribute__(self, attr: str) -> str:
return 'REDACTED'
__GetItem__
__GetNewArgs__
__Gt__
__Hash__
__Index__
__Init__
__Init_Subclass__
__Int__
__Invert__
__Le__
__Len__
__LShift__
__Lt__
__Mod__
__Mul__
__Ne__
__Neg__
__New__
The __new__() method is called immediately when a class instance is created, even before __init__().
class Employee(object):
def __new__(cls):
print("INFO: creating new employee")
return object.__new__(cls)The return type is best annotated as typing.Self. See here for more details.
__Or__
__Pos__
__Pow__
__RAdd__
The reflected __add__() method.
__RAnd__
The reflected __and__() method.
__RDivMod__
The reflected __divmod__() method.
__Reduce__
__Reduce_Ex__
__Repr__
__RFloorDiv__
The reflected __floordiv__() method.
__RLShift__
The reflected __lshift__() method.
__RMod__
The reflected __mod__() method.
__RMul__
The reflected __mul__() method.
__ROr__
The reflected __or__() method.
__Round__
__RPow__
The reflected __pow__() method.
__RRShift__
The reflected __rshift__() method.
__RShift__
__RSub__
The reflected __sub__() method.
__RTrueDiv__
The reflected __truediv__() method.
__RXor__
The reflected __xor__() method.
__SetItem__
__SizeOf__
__Str__
__Sub__
__SubclassHook__
__TrueDiv__
__Trunc__