我正在使用Pyomo解决一个供应链优化问题，我需要在模型中设置特定变量的约束。约束条件是变量应在集合（0,1）或（200，无穷大）内。但是，当我尝试设置该约束时，我得到一个TypeError，下面是我的代码：

def rail_rule(model):
        for route in routes:
            if "rail" in route[0].lower():
                dest = route[0]
                dg = route[1]
                sg = route[2]
                site = route[3]
                return model.x[dest, dg, sg, site]>=200 or model.x[dest, dg, sg, site]<=1

model.railconst = Constraint(rule = rail_rule)

我在运行时遇到此错误：

TypeError: Relational expression used in an unexpected Boolean context.

        The inequality expression:
            200.0  <=  x[RAIL - KENSINGTON,8,8,BROCKLESBY]
        contains non-constant terms (variables) that were evaluated in an
        unexpected Boolean context at
          File '<ipython-input-168-901363ebc86f>', line 8:
    return model.x[dest, dg, sg, site]>=200 or model.x[dest, dg, sg, site]<=1

        Evaluating Pyomo variables in a Boolean context, e.g.
            if expression <= 5:
        is generally invalid.  If you want to obtain the Boolean value of the
        expression based on the current variable values, explicitly evaluate the
        expression using the value() function:
            if value(expression) <= 5:
        or
            if value(expression <= 5):

所以我的理解是，我不能给Pyomo一个布尔表达式作为约束，但是我对Pyomo很陌生，不太确定这是我的问题还是我做得正确。

这个约束也可以作为边界在变量初始化中实现，但是我找不到在Pyomo中为单个变量设置两个边界的方法。

谢谢