A test for Maya's falloffCurveAttr control and attribute.

test_falloffCurveAttr.py

import maya.cmds as cmds
import maya.mel as mel

cmds.group(em=True)
cmds.addAttr(at='float2', ln='testFCurve', m=True)
cmds.addAttr(at='float', ln='testFCurvePosition', p='testFCurve', dv=-1)
cmds.addAttr(at='float', ln='testFCurveValue', p='testFCurve', dv=-1)
cmds.setAttr('.testFCurve[0]', 0, 0)
cmds.setAttr('.testFCurve[1]', .5, 0)
cmds.setAttr('.testFCurve[2]', .5, 1)
cmds.setAttr('.testFCurve[3]', 1, 1)

cmds.window(t='falloffCurve')
f = cmds.formLayout()
c = cmds.falloffCurveAttr(at='.testFCurve')
cmds.formLayout(f, e=True, af=((c, 'top', 0), (c, 'bottom', 0), (c, 'left', 0), (c, 'right', 0)))
cmds.showWindow()

cmds.addAttr(ln='testRamp', at='compound', nc=3, m=True)
cmds.addAttr(ln='testRamp_Position', at='float', p='testRamp', dv=-1)
cmds.addAttr(ln='testRamp_FloatValue', at='float', p='testRamp', dv=-1)
cmds.addAttr(ln='testRamp_Interp', at='enum', en='None:Linear:Smooth:Spline', dv=1, min=0, max=3, p='testRamp')
cmds.setAttr('.testRamp[0]', 0, 0, 2)
cmds.setAttr('.testRamp[1]', 1, 1, 2)

cmds.window(t='ramp')
cmds.columnLayout()
mel.eval('if (! exists("AEmakeLargeRamp")) source AEaddRampControl')
mel.eval('AEmakeLargeRamp("%s.testRamp", 0, 0, 0, 0, 0)' % cmds.ls(sl=True)[0])
cmds.showWindow()

thanks mate