js = """  
function add(num1,num2){
    return num1+num2
}
"""
def func1():
    import execjs
    # pip install PyExecjs
    # 编译加载js代码    ctx指的是js上下文环境
    ctx = execjs.compile(js)
    #  执行js
    rs = ctx.call('add',1,1)
    print(rs)

def func2():
    import js2py
    # pip install js2py
    # 创建js对象
    content =js2py.EvalJs()
    content.execute(js)
    result = content.add(1,2)
    print(result)