Update tutorial 0 (#102)

* update figure * update tutorial
OpenMined · Jul 16, 2020 · 1af74f0 · 1af74f0
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diff --git a/tutorials/Tutorial 0 - Getting Started.ipynb b/tutorials/Tutorial 0 - Getting Started.ipynb
@@ -25,7 +25,7 @@
     "\n",
     "__Definition__ : Homomorphic encription (HE) is an encryption technique that allows computations to be made on ciphertexts and generates results that when decrypted, corresponds to the result of the same computations made on plaintexts.\n",
     "\n",
-    "![he-black-box](assets/he-black-box.png)\n",
+    "<img src=\"assets/he-black-box.png\" alt=\"he-black-box\" width=\"600\"/>\n",
     "\n",
     "This means that an HE scheme lets you encrypt two numbers *X* and *Y*, add their encrypted versions so that it gets decrypted to *X + Y*, the addition could have been a multiplication as well. If we translate this to python, it may look something like this:\n",
     "\n",
@@ -66,7 +66,7 @@
     {
      "data": {
       "text/plain": [
-       "<_tenseal_cpp.TenSEALContext at 0x7f8f8c7a4970>"
+       "<_tenseal_cpp.TenSEALContext at 0x7fcb980c71f0>"
       ]
      },
      "execution_count": 1,
@@ -157,7 +157,7 @@
     {
      "data": {
       "text/plain": [
-       "<_tenseal_cpp.BFVVector at 0x7f8f8c7a98b0>"
+       "<_tenseal_cpp.BFVVector at 0x7fcb980bc330>"
       ]
      },
      "execution_count": 3,
@@ -303,8 +303,8 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "c2c multiply time: 15.959024429321289 ms\n",
-      "c2p multiply time: 1.3453960418701172 ms\n"
+      "c2c multiply time: 18.739938735961914 ms\n",
+      "c2p multiply time: 1.5423297882080078 ms\n"
      ]
     }
    ],
@@ -370,14 +370,18 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "global_scale: -1.0\n",
+      "The global_scale isn't defined yet\n",
       "global_scale: 1048576.0\n"
      ]
     }
    ],
    "source": [
-    "# global_scale = -1 means that it's not defined yet\n",
-    "print(\"global_scale:\", context.global_scale)\n",
+    "# this should throw an error as the global_scale isn't defined yet\n",
+    "try:\n",
+    "    print(\"global_scale:\", context.global_scale)\n",
+    "except ValueError:\n",
+    "    print(\"The global_scale isn't defined yet\")\n",
+    "    \n",
     "# you can define it to 2 ** 20 for instance\n",
     "context.global_scale = 2 ** 20\n",
     "print(\"global_scale:\", context.global_scale)"

diff --git a/tutorials/assets/he-black-box.png b/tutorials/assets/he-black-box.png