add_curve_aceous_galore.py

        col = layout.column()
        col.label(text="Output Curve Type")
        row = layout.row()
        row.prop(props, 'outputType', expand=True)
        col = layout.column()
        col.label(text="Curve Options")

        # output options
        box = layout.box()
        if props.outputType == 'NURBS':
            box.row().prop(props, 'shape', expand=True)
            box.prop(props, 'cyclic_u')
            #box.prop(props, 'endp_u')
            box.prop(props, 'order_u')

        if props.outputType == 'POLY':
            box.row().prop(props, 'shape', expand=True)
            box.prop(props, 'cyclic_u')

        if props.outputType == 'BEZIER':
            box.row().prop(props, 'shape', expand=True)
            box.row().prop(props, 'handleType', expand=True)
            box.prop(props, 'cyclic_u')


    ##### POLL #####
    def poll(self, context):
        return context.scene != None

    ##### EXECUTE #####
    def execute(self, context):
        # turn off undo
        undo = bpy.context.user_preferences.edit.global_undo
        bpy.context.user_preferences.edit.global_undo = False

        props = self.properties
        if props.GalloreType in ['Helix', 'Cycloid']:
            props.shape = '3D'
        if props.GalloreType in ['Helix']:
            props.cyclic_u = False

        # Options
        options = [
            # general properties
            props.outputType,           #0
            props.GalloreType,          #1
            # ProfileCurve properties
            props.ProfileCurveType,     #2
            props.ProfileCurvevar1,     #3
            props.ProfileCurvevar2,     #4
            # MiscCurve properties
            props.MiscCurveType,        #5
            props.MiscCurvevar1,        #6
            props.MiscCurvevar2,        #7
            props.MiscCurvevar3,        #8
            # Common properties
            props.innerRadius,          #9
            props.middleRadius,         #10
            props.outerRadius,          #11
            # Flower properties
            props.petals,               #12
            props.petalWidth,           #13
            # Star properties
            props.starPoints,           #14
            props.starTwist,            #15
            # Arc properties
            props.arcSides,             #16
            props.startAngle,           #17
            props.endAngle,             #18
            props.arcType,              #19
            # Cogwheel properties
            props.teeth,                #20
            props.bevel,                #21
            # Nsided property
            props.Nsides,               #22
            # Splat properties
            props.splatSides,           #23
            props.splatScale,           #24
            props.seed,                 #25
            props.basis,                #26
            # Helix properties
            props.helixPoints,          #27
            props.helixHeight,          #28
            props.helixStart,           #29
            props.helixEnd,             #30
            props.helixWidth,           #31
            props.helix_a,              #32
            props.helix_b,              #33
            # Cycloid properties
            props.cycloPoints,          #34
            props.cyclo_d,          #35
            props.cycloType,            #36
            props.cyclo_a,              #37
            props.cyclo_b,              #38
            props.cycloStart,           #39
            props.cycloEnd              #40
            ]

        # Curve options
        curveOptions = [
            props.shape,        #0
            props.cyclic_u,     #1
            props.endp_u,       #2
            props.order_u,      #4
            props.handleType    #5
            ]

        # main function
        main(context, options, curveOptions, self.align_matrix)
        
        # restore pre operator undo state
        bpy.context.user_preferences.edit.global_undo = undo

        return {'FINISHED'}

    ##### INVOKE #####
    def invoke(self, context, event):
        # store creation_matrix
        self.align_matrix = align_matrix(context)
        self.execute(context)

        return {'FINISHED'}

################################################################################
##### REGISTER #####

Curveaceous_galore_button = (lambda self, context: self.layout.operator
            (Curveaceous_galore.bl_idname, text="curvatures gallore", icon="PLUGIN"))

classes = [
Curveaceous_galore
    ]

def register():
    register = bpy.types.register
    for cls in classes:
        register(cls)

    bpy.types.INFO_MT_curve_add.append(Curveaceous_galore_button)

def unregister():
    unregister = bpy.types.unregister
    for cls in classes:
        unregister(cls)

    bpy.types.INFO_MT_curve_add.remove(Curveaceous_galore_button)

if __name__ == "__main__":
    register()