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

[n.zi...@gmail.com]

I am trying to add variables and I get this error

costs = {}

for carrier in carriers:

    for row in df_merged.to_dict('records'):

        key = (row['Ship_Dt'],row['Client_Code'],row['Ship_loc'],row['Service'],row['Bill Weight'],row['Zone'],row['Resi'],carrier)

        costs[key] = row[carrier]

                

m = Model('rate_shop_holiday')

assign=tupledict()

for i,j,k,l,m,n,o,p in costs.keys():

    assign[i,j,k,l,m,n,o,p] = m.addVar(vtype=GRB.BINARY )

[Dr Michael F]

You are using m as the name of the model as as one of your loop variables in the for loop!