Ok , i 'am looking for create a TSP envirenement to solving by deep reinforcment learning
the class TSPDataset is my env_tsp, getItem is the methods to selecte the action in every step, i assume that is the key to fixed the start city in each predicted tour. The TSPdataset  is a combination of dataset which contain the (xcoords, ycoords) and a dynamic vector contain the city index.
In briefly i whish to help me, to fixed the start city that is city with index 1 and used  it as a  rule for agent policy .
for example : i want to give me a permutatio n of city like this:
0,4,8,1,4,9…,0
0,1,3,9,5,7,…,0
thank’s