Python Pyomo初始化错误：错误：计算表达式：未初始化NumericValue对象没有值

我正在pyomo中运行一个模型，该模型正在对齐一个错误：

模型结构为：

from __future__ import division
from pyomo.environ import *
from sys import *

model = AbstractModel()


# Sets

model.Vo = Set()                           # 
model.Vf = Set()                           # 
model.Vc = Set()                           # 
model.Vfc = model.Vf | model.Vc            # 
model.V = model.Vo | model.Vf | model.Vc   # set of nodes

我想在这里创建一个布尔变量

# Variables

model.x_ijl = Var(model.V, model.V, model.K, within=Boolean)      # x_ijl= 1 iff l in K uses arc (i,j) in A # 

.dat文件是：

set Vo := 0;
set Vf := 1 2;
set Vc := 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19;   

但它抱怨使用x_ijl的目标和约束都存在错误：

对象中的错误：

ERROR: evaluating object as numeric value: ...

constriants中的错误：

ERROR: evaluating expression: No value for uninitialized NumericValue object

将x_ijl初始化为零或一对我来说没有意义，因为它是一个布尔变量

有人能帮我想出最好的办法吗

编辑：这是回溯：

Objectives:
    obj : Size=1, Index=None, Active=True
ERROR: evaluating expression: No value for uninitialized NumericValue object
x_ijl[0,5,1]
    (expression: 67*x_ijl[0,5,1] + 67*x_ijl[0,5,2] + 67*x_ijl[0,5,3] +
    67*x_ijl[0,5,4] + 70*x_ijl[0,6,1] + 70*x_ijl[0,6,2] + 70*x_ijl[0,6,3]
    + 70*x_ijl[0,6,4] + 70*x_ijl[0,7,1] + 70*x_ijl[0,7,2] +
    70*x_ijl[0,7,3] + 70*x_ijl[0,7,4] + 81*x_ijl[0,10,1] +
    81*x_ijl[0,10,2] + 81*x_ijl[0,10,3] + 81*x_ijl[0,10,4] +
    73*x_ijl[1,5,1] + 73*x_ijl[1,5,2] + 73*x_ijl[1,5,3] + 73*x_ijl[1,5,4]
    + 63*x_ijl[1,6,1] + 63*x_ijl[1,6,2] + 63*x_ijl[1,6,3] +
    63*x_ijl[1,6,4] + 69*x_ijl[1,7,1] + 69*x_ijl[1,7,2] + 69*x_ijl[1,7,3]
    + 69*x_ijl[1,7,4] + 75*x_ijl[1,10,1] + 75*x_ijl[1,10,2] +
    75*x_ijl[1,10,3] + 75*x_ijl[1,10,4] + 95*x_ijl[1,11,1] +
    95*x_ijl[1,11,2] + 95*x_ijl[1,11,3] + 95*x_ijl[1,11,4] +
    66*x_ijl[2,6,1] + 66*x_ijl[2,6,2] + 66*x_ijl[2,6,3] + 66*x_ijl[2,6,4]
    + 80*x_ijl[2,7,1] + 80*x_ijl[2,7,2] + 80*x_ijl[2,7,3] +
    80*x_ijl[2,7,4] + 73*x_ijl[2,8,1] + 73*x_ijl[2,8,2] + 73*x_ijl[2,8,3]
    + 73*x_ijl[2,8,4] + 85*x_ijl[2,11,1] + 85*x_ijl[2,11,2] +

...
...

ERROR: evaluating expression: No value for uninitialized NumericValue object
x_ijl[0,8,4]
    (expression: x_ijl[0,8,4] + x_ijl[1,8,4] + x_ijl[2,8,4] + x_ijl[3,8,4]
    + x_ijl[4,8,4] + x_ijl[5,8,4] + x_ijl[6,8,4] + x_ijl[7,8,4] +
    x_ijl[8,8,4] + x_ijl[9,8,4] + x_ijl[10,8,4] + x_ijl[11,8,4] +
    x_ijl[12,8,4] + x_ijl[13,8,4] + x_ijl[14,8,4] + x_ijl[15,8,4] +
    x_ijl[16,8,4] + x_ijl[17,8,4] + x_ijl[18,8,4] + x_ijl[19,8,4] -
    x_ijl[8,0,4] - x_ijl[8,1,4] - x_ijl[8,2,4] - x_ijl[8,3,4] -
    x_ijl[8,4,4] - x_ijl[8,5,4] - x_ijl[8,6,4] - x_ijl[8,7,4] -
    x_ijl[8,8,4] - x_ijl[8,9,4] - x_ijl[8,10,4] - x_ijl[8,11,4] -
    x_ijl[8,12,4] - x_ijl[8,13,4] - x_ijl[8,14,4] - x_ijl[8,15,4] -
    x_ijl[8,16,4] - x_ijl[8,17,4] - x_ijl[8,18,4] - x_ijl[8,19,4])
    Key : Lower : Body : Upper

...
...

Traceback (most recent call last):
  File "main.py", line 17, in <module>
instance.display()
  File "/usr/local/lib/python2.7/dist-packages/pyomo/core/base/block.py", line 1890, in display
Block.display(self, filename, ostream, prefix)
  File "/usr/local/lib/python2.7/dist-packages/pyomo/core/base/block.py", line 1870, in display
_BlockData.display(self[key], filename, ostream, prefix)
  File "/usr/local/lib/python2.7/dist-packages/pyomo/core/base/block.py", line 1621, in display
obj.display(prefix=prefix + "    ", ostream=ostream)
  File "/usr/local/lib/python2.7/dist-packages/pyomo/core/base/constraint.py", line 843, in display
lambda k, v: [ value(v.lower),
  File "/usr/local/lib/python2.7/dist-packages/pyomo/core/base/misc.py", line 245, in tabular_writer
+ "\n")
  File "/usr/local/lib/python2.7/dist-packages/pyomo/core/base/misc.py", line 244, in <genexpr>
+ " : ".join( _width[i] % x for i,x in enumerate(_data) )
TypeError: not all arguments converted during string formatting

目标：
obj:Size=1，Index=None，Active=True
错误：计算表达式：未初始化的NumericValue对象没有值
x_ijl[0,5,1]
（表达式：67*x_ijl[0,5,1]+67*x_ijl[0,5,2]+67*x_ijl[0,5,3]+
67*x_ijl[0,5,4]+70*x_ijl[0,6,1]+70*x_ijl[0,6,2]+70*x_ijl[0,6,3]
+70*x_ijl[0,6,4]+70*x_ijl[0,7,1]+70*x_ijl[0,7,2]+
70*x_ijl[0,7,3]+70*x_ijl[0,7,4]+81*x_ijl[0,10,1]+
81*x_-ijl[0,10,2]+81*x_-ijl[0,10,3]+81*x_-ijl[0,10,4]+
73*x_ijl[1,5,1]+73*x_ijl[1,5,2]+73*x_ijl[1,5,3]+73*x_ijl[1,5,4]
+63*x_ijl[1,6,1]+63*x_ijl[1,6,2]+63*x_ijl[1,6,3]+
63*x_ijl[1,6,4]+69*x_ijl[1,7,1]+69*x_ijl[1,7,2]+69*x_ijl[1,7,3]
+69*x_ijl[1,7,4]+75*x_ijl[1,10,1]+75*x_ijl[1,10,2]+
75*x_ijl[1,10,3]+75*x_ijl[1,10,4]+95*x_ijl[1,11,1]+
95*x_ijl[1,11,2]+95*x_ijl[1,11,3]+95*x_ijl[1,11,4]+
66*x_ijl[2,6,1]+66*x_ijl[2,6,2]+66*x_ijl[2,6,3]+66*x_ijl[2,6,4]
+80*x_ijl[2,7,1]+80*x_ijl[2,7,2]+80*x_ijl[2,7,3]+
80*x_ijl[2,7,4]+73*x_ijl[2,8,1]+73*x_ijl[2,8,2]+73*x_ijl[2,8,3]
+73*x_ijl[2,8,4]+85*x_ijl[2,11,1]+85*x_ijl[2,11,2]+
...
...
错误：计算表达式：未初始化的NumericValue对象没有值
x_ijl[0,8,4]
（表达式：x_ijl[0,8,4]+x_ijl[1,8,4]+x_ijl[2,8,4]+x_ijl[3,8,4]
+x_ijl[4,8,4]+x_ijl[5,8,4]+x_ijl[6,8,4]+x_ijl[7,8,4]+
x_ijl[8,8,4]+x_ijl[9,8,4]+x_ijl[10,8,4]+x_ijl[11,8,4]+
x_ijl[12,8,4]+x_ijl[13,8,4]+x_ijl[14,8,4]+x_ijl[15,8,4]+
x_ijl[16,8,4]+x_ijl[17,8,4]+x_ijl[18,8,4]+x_ijl[19,8,4]-
x_ijl[8,0,4]-x_ijl[8,1,4]-x_ijl[8,2,4]-x_ijl[8,3,4]-
x_ijl[8,4,4]-x_ijl[8,5,4]-x_ijl[8,6,4]-x_ijl[8,7,4]-
x_ijl[8,8,4]-x_ijl[8,9,4]-x_ijl[8,10,4]-x_ijl[8,11,4]-
x_ijl[8,12,4]-x_ijl[8,13,4]-x_ijl[8,14,4]-x_ijl[8,15,4]-
x_ijl[8,16,4]-x_ijl[8,17,4]-x_ijl[8,18,4]-x_ijl[8,19,4]）
键：下：身体：上
...
...
回溯（最近一次呼叫最后一次）：
文件“main.py”，第17行，在
instance.display（）
文件“/usr/local/lib/python2.7/dist packages/pyomo/core/base/block.py”，显示第1890行
Block.display（self、文件名、ostream、前缀）
文件“/usr/local/lib/python2.7/dist packages/pyomo/core/base/block.py”，第1870行，显示
_BlockData.display（self[key]，文件名，ostream，前缀）
文件“/usr/local/lib/python2.7/dist packages/pyomo/core/base/block.py”，第1621行，显示
对象显示（前缀=前缀+“”，ostream=ostream）
文件“/usr/local/lib/python2.7/dist-packages/pyomo/core/base/constraint.py”，显示第843行
λk，v:[值（v.较低），
文件“/usr/local/lib/python2.7/dist-packages/pyomo/core/base/misc.py”，第245行，表格格式
+“\n”）
文件“/usr/local/lib/python2.7/dist packages/pyomo/core/base/misc.py”，第244行，在
+“：”.join（_-width[i]%x表示i，x在枚举（_-data））中）
TypeError:在字符串格式化过程中并非所有参数都已转换

二进制变量，如

model.x_ijl

不能直接用于python

if

语句中。我怀疑这就是错误发生的地方。堆栈跟踪会很有帮助。谢谢@Oi，我添加了跟踪。回溯指的错误与您的问题所问的不同？我只是发送了部分错误，因为它的长度是错误开始于跟踪之前的一次发布，我觉得应该从错误的来源开始！我已经编辑了！您可以再看一看。感谢您暂时尝试使用

model.pprint（）

而不是

model.display（）

进行故障排除，然后再调用

solve（）

语句。我在Github上提出了

display（）

问题。