AttributeError: 'int' object has no attribute 'addVar'

[penpichaya thamthada]

I use Gurobi optimizer in Python. However, I run it and it said AttributeError: 'int' object has no attribute 'addVar'. The following is how I obtain Vi, K which are used to create the variable x.

###############################################################

################ Set of available vehicles ####################

###############################################################

n_vehicle = sheet.cell_value(13, 23)

n_vehicle = int(round(n_vehicle))

K = []

for i in range(1,n_vehicle+1):

K.append(i)

###############################################################

###################### New EDGE ###############################

###############################################################

edge = {}

temp_for_all_j = []

for i in range(1,count_temp+1):

edge[i] = {}

for j in range(1,count_temp+1):

edge[i][j] = []

temp_for_all_j.append(i)

for i in range(1,len(temp_for_all_j)+1):

for j in range(1,len(temp_for_all_j)+1):

for k in range(len(V_i)):

for l in range(len(V_i[k])):

if i == V_i[k][l]:

fromI = k

if j == V_i[k][l]:

toI = k

if fromI == toI:

if i == j:

edge[i][j].append({"From Imaging Center":fromI, "To Imaging Center":toI, "From Patient":i, "To Patient":j, "distance":0, "time":0, "cost":2000})

else:

edge[i][j].append({"From Imaging Center":fromI, "To Imaging Center":toI, "From Patient":i, "To Patient":j, "distance":0, "time":0, "cost":0})

else:

for m in range(13,41):

if fromI == int(round((sheet.cell_value(m, 4)))) and toI == int(round((sheet.cell_value(m, 5)))):

distance = int(round((sheet.cell_value(m, 6))))

time = int(round((sheet.cell_value(m, 10))))

cost = (distance*m_v)+(time*m_t)

edge[i][j].append({"From Imaging Center":fromI, "To Imaging Center":toI, "From Patient":i, "To Patient":j, "distance":distance, "time":time, "cost":cost})

else:

if fromI == int(round((sheet.cell_value(m, 5)))) and toI == int(round((sheet.cell_value(m, 4)))):

distance = int(round((sheet.cell_value(m, 6))))

time = int(round((sheet.cell_value(m, 10))))

cost = (distance*m_v)+(time*m_t)

edge[i][j].append({"From Imaging Center":fromI, "To Imaging Center":toI, "From Patient":i, "To Patient":j, "distance":distance, "time":time, "cost":cost})

json_data = json.dumps(edge) 

#with open("Output.txt", "w") as text_file:

#    print(json_data, file=text_file)

#print("complete")

Vi = temp_for_all_j

[Renan Garcia]

Note you are using the 'm' variable in 2 different contexts. 'for m in range(13,41)' assigns it an integer value, and then you are trying to work with it as a model with 'm.addVar()'.

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[penpichaya thamthada]

Ohh I see. Thank you