Start VRP.

vrp/vrp.py

@@ -0,0 +1,76 @@
+import math
+
+
+class Customer(object):
+    def __init__(self, index, demand, x, y):
+        self.index = index
+        self.demand = demand
+        self.x = x
+        self.y = y
+
+    def __str__(self):
+        m = "C({}, {})".format(self.index, self.demand)
+        return m
+
+
+class Vrp(object):
+
+    def __init__(self, input_data):
+        lines = input_data.split('\n')
+        parts = lines[0].split()
+        self.customer_count = int(parts[0])
+        self.vehicle_count = int(parts[1])
+        self.vehicle_capacity = int(parts[2])
+
+        customers = []
+        for i in range(1, self.customer_count + 1):
+            line = lines[i]
+            parts = line.split()
+            demand = int(parts[0])
+            x, y = map(float, parts[1:])
+            c = Customer(i - 1, demand, x, y)
+            customers.append(c)
+
+        self.depot = customers[0]
+        self.customers = customers[1:]
+
+    def plot(self):
+        try:
+            import matplotlib.pyplot as plt
+        except ModuleNotFoundError:
+            return
+
+        for c in self.customers:
+            plt.plot(c.x, c.y, 'rx')
+            plt.text(c.x, c.y, f'  {c}')
+
+        d = self.depot
+        plt.plot(d.x, d.y, 'bo')
+
+        plt.show()
+
+    def solve_trivial(self):
+        pass
+
+    def to_output(self):
+        return ""
+        outputData = '%.2f' % obj + ' ' + str(0) + '\n'
+        for v in range(0, vehicle_count):
+            outputData += str(depot.index) + ' ' + ' '.join([str(customer.index) for customer in vehicle_tours[v]]) + ' ' + str(depot.index) + '\n'
+
+        return outputData
+
+
+def solve_it(input_data):
+    vrp = Vrp(input_data)
+    vrp.plot()
+    print(vrp.customer_count)
+
+    return vrp.to_output()
+
+
+if __name__ == "__main__":
+    file_location =  "data/vrp_16_3_1"
+    with open(file_location, 'r') as f:
+        print(solve_it(f.read()))
+