我想使用 pyomo.environ import * 并拥有以下代码：
## Define sets ##
model.i = Set(initialize=i_set)
model.p = Set(initialize=j_set)
## Define parameters ##
model.precedence = Param (model.i, initialize=precedence, doc='precedence relationship')
model.duration = Param (model.p,initialize=duration,doc='duration')
## Define variables ##
model.x = Var(model.i, within=NonNegativeReals)
model.z = Var(within=NonNegativeReals)
但我给了我这个错误：
ERROR: Constructing component 'duration' from data=None failed:
KeyError: "Error setting parameter value: Index '42' is not valid for array Param 'duration'"
Traceback (most recent call last):
File "D:\0.- MS CM UH\3.- Data Analysis in CM\hwk#7\Exercise 9.5.py", line 33, in <module>
model.duration = Param(model.p,initialize=duration,doc='duration')
我已经定义了参数 Param。我不知道为什么我有这个错误。