MFnAttribute

Base Class

Constants

Name Type Description

Disconnect Behavior

kDelete int Delete array element (array attributes only).

kReset int Reset the attribute to its default.

kNothing int Do nothing to the attribute's value.

Name	Type	Description
Disconnect Behavior
kDelete	int	Delete array element (array attributes only).
kReset	int	Reset the attribute to its default.
kNothing	int	Do nothing to the attribute's value.

Static Methods

None.

Static Attributes

None.

Constructors

Signature Parameters Description

MFnAttribute() Default constructor. Returns a new MFnAttribute function set with no Maya object attached.

MFnAttribute(object) object - MObject Returns a new MFnAttribute function set, attached to the specified Maya object.

Signature	Parameters	Description
MFnAttribute()		Default constructor. Returns a new MFnAttribute function set with no Maya object attached.
MFnAttribute(object)	object - MObject	Returns a new MFnAttribute function set, attached to the specified Maya object.

Object Methods

Signature Parameters Returns Description

accepts(type) type - MTypeId or MFn Type constant bool Returns True if this attribute can accept a connection of the given type.

getAddAttrCmd(longFlags=False) longFlags - bool string Returns a string containing the addAttr command which would be required to recreate the attribute. The command includes the terminating semicolon and is formatted as if for use with a selected node, meaning that it contains no node name. If longFlags is True then the long flag names will be used, otherwise their short names will be used.

Signature	Parameters	Returns	Description
accepts(type)	type - MTypeId or MFn Type constant	bool	Returns True if this attribute can accept a connection of the given type.
getAddAttrCmd(longFlags=False)	longFlags - bool	string	Returns a string containing the addAttr command which would be required to recreate the attribute. The command includes the terminating semicolon and is formatted as if for use with a selected node, meaning that it contains no node name. If longFlags is True then the long flag names will be used, otherwise their short names will be used.

Object Attributes

Name Type Access Description

affectsAppearance bool RW Does attr affect appearance of object when rendered in the viewport?

affectsWorldSpace bool RW DAG nodes only. Does the attr affect the node's world-space state?

array bool RW Is attr an array?

cached bool RW Should attr value be cached in the datablock?

channelBox bool RW Should attr appear in Channel Box?

connectable bool RW Is attr connectable?

disconnectBehavior Disconnect Behaviour constant RW What should happen when attr loses an incoming connection?

dynamic bool R Is it a dynamic attr?

extension bool R Is it an extension attr?

hidden bool RW If True attr will not be displayed in the Attribute Editor.

indeterminant bool RW Hint to DG that this attr may not always be used when computing the attrs which are dependent upon it.

indexMatters bool RW If False, connectAttr -nextAvailable can be used with this attr. If True then an explicit index must be provided.

internal bool RW Will the node handle the attr's data storage itself, outside of the node's data block?

keyable bool RW Can keys be set on attr?

name string R Attr's long name.

parent MObject RW Parent attr. MObject::kNullObj if attr has no parent.

readable bool RW Is attr readable?

renderSource bool RW Is attr a render source?

shortName string R Attr's short name.

storable bool RW Should attr value be stored when written to file?

usedAsColor bool RW Should attr be treated as a color in the UI?

usedAsFilename bool RW Should attr be treated as a filename in the UI?

usesArrayDataBuilder bool RW Array attrs only. Does attr create elements using MArrayDataBuilder?

worldSpace bool RW DAG nodes only. If the node is instanced, will the attr have separate values for each instance?

writable bool RW Is attr writable?

Name	Type	Access	Description
affectsAppearance	bool	RW	Does attr affect appearance of object when rendered in the viewport?
affectsWorldSpace	bool	RW	DAG nodes only. Does the attr affect the node's world-space state?
array	bool	RW	Is attr an array?
cached	bool	RW	Should attr value be cached in the datablock?
channelBox	bool	RW	Should attr appear in Channel Box?
connectable	bool	RW	Is attr connectable?
disconnectBehavior	Disconnect Behaviour constant	RW	What should happen when attr loses an incoming connection?
dynamic	bool	R	Is it a dynamic attr?
extension	bool	R	Is it an extension attr?
hidden	bool	RW	If True attr will not be displayed in the Attribute Editor.
indeterminant	bool	RW	Hint to DG that this attr may not always be used when computing the attrs which are dependent upon it.
indexMatters	bool	RW	If False, connectAttr -nextAvailable can be used with this attr. If True then an explicit index must be provided.
internal	bool	RW	Will the node handle the attr's data storage itself, outside of the node's data block?
keyable	bool	RW	Can keys be set on attr?
name	string	R	Attr's long name.
parent	MObject	RW	Parent attr. MObject::kNullObj if attr has no parent.
readable	bool	RW	Is attr readable?
renderSource	bool	RW	Is attr a render source?
shortName	string	R	Attr's short name.
storable	bool	RW	Should attr value be stored when written to file?
usedAsColor	bool	RW	Should attr be treated as a color in the UI?
usedAsFilename	bool	RW	Should attr be treated as a filename in the UI?
usesArrayDataBuilder	bool	RW	Array attrs only. Does attr create elements using MArrayDataBuilder?
worldSpace	bool	RW	DAG nodes only. If the node is instanced, will the attr have separate values for each instance?
writable	bool	RW	Is attr writable?

Sequence Support

None.

Number Support

None.

Comparison Support

None.