update the url

intro_to_gurobipy/intro_to_gurobipy/intro_to_gurobipy.ipynb

@@ -647,10 +647,10 @@
     "\n",
     "    generator = (x[i] + y[j] <= 1 for i in I for j in J)\n",
     "    model.addConstrs(generator, name=\"c\")\n",
-    "    model.update() \n",
+    "    model.update()\n",
     "\n",
     "    # Print constraint names\n",
-    "    print(model.getAttr(\"ConstrName\", model.getConstrs())) "
+    "    print(model.getAttr(\"ConstrName\", model.getConstrs()))"
    ]
   },
   {
@@ -752,7 +752,7 @@
     "import gurobipy as gp\n",
     "from gurobipy import GRB\n",
     "\n",
-    "url = \"https://raw.githubusercontent.com/Gurobi/modeling-examples/master/intro_to_gurobipy/intro_to_gurobipy/data/glass4.mps.bz2\"\n",
+    "url = \"https://raw.githubusercontent.com/Gurobi/modeling-examples/master/intro_to_gurobipy/intro_to_gurobipy/data\"\n",
     "path_to_file, _ = urllib.request.urlretrieve(url, \"./glass4.mps.bz2\")\n",
     "\n",
     "# running notebook locally:\n",
@@ -800,7 +800,7 @@
     "import gurobipy as gp\n",
     "from gurobipy import GRB\n",
     "\n",
-    "url = \"https://raw.githubusercontent.com/Gurobi/modeling-examples/master/intro_to_gurobipy/intro_to_gurobipy/data/glass4.mps.bz2\"\n",
+    "url = \"https://raw.githubusercontent.com/Gurobi/modeling-examples/master/intro_to_gurobipy/intro_to_gurobipy/data\"\n",
     "path_to_file, _ = urllib.request.urlretrieve(url, \"./glass4.mps.bz2\")\n",
     "\n",
     "# running notebook locally:\n",
@@ -985,7 +985,7 @@
     "    y = model.addVars(n, vtype=GRB.BINARY, name=\"y\")\n",
     "\n",
     "    risk = gp.quicksum(x[i] * sigma[i, j] * x[j] for i in range(n) for j in range(n))\n",
-    "    # Another approach to build the risk expression \n",
+    "    # Another approach to build the risk expression\n",
     "    # risk = gp.QuadExpr()\n",
     "    # for i in range(n):\n",
     "    #    for j in range(n):\n",