Merge pull request CamDavidsonPilon#529 from thomasaarholt/patch-1

Fix PyMC3 warnings in Chapter 1

Author: CamDavidsonPilon

Chapter1_Introduction/Ch1_Introduction_PyMC3.ipynb

@@ -209,7 +209,7 @@
     "\n",
     "# For the already prepared, I'm using Binomial's conj. prior.\n",
     "for k, N in enumerate(n_trials):\n",
-    "    sx = plt.subplot(len(n_trials)/2, 2, k+1)\n",
+    "    sx = plt.subplot(len(n_trials)//2, 2, k+1)\n",
     "    plt.xlabel(\"$p$, probability of heads\") \\\n",
     "        if k in [0, len(n_trials)-1] else None\n",
     "    plt.setp(sx.get_yticklabels(), visible=False)\n",
@@ -650,7 +650,6 @@
    ],
    "source": [
     "import pymc3 as pm\n",
-    "import theano.tensor as tt\n",
     "\n",
     "with pm.Model() as model:\n",
     "    alpha = 1.0/count_data.mean()  # Recall count_data is the\n",
@@ -730,7 +729,7 @@
     "### Mysterious code to be explained in Chapter 3.\n",
     "with model:\n",
     "    step = pm.Metropolis()\n",
-    "    trace = pm.sample(10000, tune=5000,step=step)"
+    "    trace = pm.sample(10000, tune=5000, step=step, return_inferencedata=False)"
    ]
   },
   {