Pycomcad实现Autocad橡皮线效果

import sys
sys.path.append(r'F:PycharmProjectPycomCAD')
from pycomcad import *
def tryit():
    acad.InitializeUserInput(32,'')
    a1=acad.GetPoint()
    acad.GetPoint(Apoint(*a1),'尝试')
tryit()