pyvcp 不适用于 python3 #815

sim/axis/lathe 工作，但 sim/pyvcp_demo 失败：

构建拨号时出错（{‘size’: 150, ‘cpr’: 100, ‘min_’: 0, ‘max_’: 100, ‘text’: ‘Dial0’, ‘initval’: 10, ‘resolution’: 0.01, ‘ halpin’: ‘dial0’, ‘dialcolor’: ‘yellow’, ‘edgecolor’: ‘green’, ‘dotcolor’: ‘black’, ‘param_pin’: 1}):
预期整数但得到“-25.0”