user: Show practical ways to work with SplineIKConstraint(Constraint) in a Blender add-on or script – include code.

assistant: # SplineIKConstraint(Constraint)

base classes — [`bpy_struct`](bpy.types.bpy_struct.html#bpy.types.bpy_struct "bpy.types.bpy_struct"), [`Constraint`](bpy.types.Constraint.html#bpy.types.Constraint "bpy.types.Constraint")

*class* bpy.types.SplineIKConstraint(*Constraint*)
:   Align ‘n’ bones along a curve

    bulge
    :   Factor between volume variation and stretching

        Type:
        :   float in [0, 100], default 0.0

    bulge_max
    :   Maximum volume stretching factor

        Type:
        :   float in [1, 100], default 0.0

    bulge_min
    :   Minimum volume stretching factor

        Type:
        :   float in [0, 1], default 0.0

    bulge_smooth
    :   Strength of volume stretching clamping

        Type:
        :   float in [0, 1], default 0.0

    chain_count
    :   How many bones are included in the chain

        Type:
        :   int in [1, 255], default 0

    joint_bindings
    :   (EXPERIENCED USERS ONLY) The relative positions of the joints along the chain, as percentages

        Type:
        :   float array of 32 items in [0, 1], default (0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0)

    target
    :   Curve that controls this relationship

        Type:
        :   [`Object`](bpy.types.Object.html#bpy.types.Object "bpy.types.Object")

    use_bulge_max
    :   Use upper limit for volume variation

        Type:
        :   boolean, default False

    use_bulge_min
    :   Use lower limit for volume variation

        Type:
        :   boolean, default False

    use_chain_offset
    :   Offset the entire chain relative to the root joint

        Type:
        :   boolean, default False

    use_curve_radius
    :   Average radius of the endpoints is used to tweak the X and Z Scaling of the bones, on top of XZ Scale mode

        Type:
        :   boolean, default False

    use_even_divisions
    :   Ignore the relative lengths of the bones when fitting to the curve

        Type:
        :   boolean, default False

    use_original_scale
    :   Apply volume preservation over the original scaling

        Type:
        :   boolean, default False

    xz_scale_mode
    :   Method used for determining the scaling of the X and Z axes of the bones

        - `NONE`
          None – Don’t scale the X and Z axes.
        - `BONE_ORIGINAL`
          Bone Original – Use the original scaling of the bones.
        - `INVERSE_PRESERVE`
          Inverse Scale – Scale of the X and Z axes is the inverse of the Y-Scale.
        - `VOLUME_PRESERVE`
          Volume Preservation – Scale of the X and Z axes are adjusted to preserve the volume of the bones.

        Type:
        :   enum in [`'NONE'`, `'BONE_ORIGINAL'`, `'INVERSE_PRESERVE'`, `'VOLUME_PRESERVE'`], default `'NONE'`

    y_scale_mode
    :   Method used for determining the scaling of the Y axis of the bones, on top of the shape and scaling of the curve itself

        - `NONE`
          None – Don’t scale in the Y axis.
        - `FIT_CURVE`
          Fit Curve – Scale the bones to fit the entire length of the curve.
        - `BONE_ORIGINAL`
          Bone Original – Use the original Y scale of the bone.

        Type:
        :   enum in [`'NONE'`, `'FIT_CURVE'`, `'BONE_ORIGINAL'`], default `'NONE'`

    *classmethod* bl_rna_get_subclass(*id*, *default=None*, */*)
    :   Parameters:
        :   **id** (*str*) – The RNA type identifier.

        Returns:
        :   The RNA type or default when not found.

        Return type:
        :   [`bpy.types.Struct`](bpy.types.Struct.html#bpy.types.Struct "bpy.types.Struct") subclass

    *classmethod* bl_rna_get_subclass_py(*id*, *default=None*, */*)
    :   Parameters:
        :   **id** (*str*) – The RNA type identifier.

        Returns:
        :   The class or default when not found.

        Return type:
        :   type