specify format

tdhopper · tdhopper · commit f3c7123e27e0 · 2020-01-01T15:33:39.000-05:00
diff --git a/Examples.ipynb b/Examples.ipynb
@@ -313,8 +313,7 @@
     "\n",
     "def render_altair(chart):\n",
     "    b = BytesIO()\n",
-    "    b.name = \"x.png\"\n",
-    "    chart.save(b, scale_factor=2.0)\n",
+    "    chart.save(b, scale_factor=2.0, format='png')\n",
     "    return b"
    ]
   },
