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    "![satacad](./images/satacadlogo.gif)\n",
    "TOC: [1](./mm1.ipynb)  [2](./mm2.ipynb)  [4](./mm4.ipynb)  [5](./mm5.ipynb) [6](./mm6.ipynb)\n",
    "\n",
    "# A & B MODULES\n",
    "\n",
    "![A & B modules](./images/abmod.gif )\n",
    "\n",
    "![A & B modules](./images/a_b_modules.gif )\n",
    "\n",
    "# T & E MODULES\n",
    "\n",
    "![T & E modules](./images/t-mod-from-rhombic-triac.gif)\n",
    "\n",
    "# S MODULE\n",
    "\n",
    "<a data-flickr-embed=\"true\"  href=\"https://www.flickr.com/photos/kirbyurner/6335726352/in/photolist-vLby2U-ujipN3-f75zUP-aDSfHf-8ryEix-8ryECF-7mcmne-5zTRjp-5zY9gA-7k4Eid-7k4Em5-7jZLe2-7jZLhp-7k4Ejf\" title=\"S Module\"><img src=\"https://farm7.staticflickr.com/6114/6335726352_902009df40.jpg\" width=\"500\" height=\"441\" alt=\"S Module\"></a><script async src=\"//embedr.flickr.com/assets/client-code.js\" charset=\"utf-8\"></script>"
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     "text": [
      "| SHAPE                          |  VOLUME  |\n",
      "---------------------------------------------\n",
      "| A module                       |  0.04167 |\n",
      "| B module                       |  0.04167 |\n",
      "| T module                       |  0.04167 |\n",
      "| E module                       |  0.04173 |\n",
      "| S module                       |  0.04508 |\n",
      "| tetrahedron                    |  1.00000 |\n",
      "| cube                           |  3.00000 |\n",
      "| octahedron                     |  4.00000 |\n",
      "| rhombic dodecahedron           |  6.00000 |\n"
     ]
    }
   ],
   "source": [
    "# build a Python dictionary of volumes\n",
    "from math import sqrt\n",
    "\n",
    "φ = (1 + sqrt(5))/2\n",
    "\n",
    "volumes = dict(((\"tetrahedron\", 1), \n",
    "                (\"cube\", 3), \n",
    "                (\"octahedron\", 4), \n",
    "                (\"rhombic dodecahedron\", 6)))\n",
    "\n",
    "modules = dict(((\"A module\", 1/24), \n",
    "                (\"B module\", 1/24), \n",
    "                (\"T module\", 1/24), \n",
    "                (\"E module\", (sqrt(2)/8) * (φ ** -3)),\n",
    "                (\"S module\", (φ **-5)/2)))\n",
    "\n",
    "volumes.update(modules)\n",
    "template = \"| {s:30} |  {v:7} |\"\n",
    "print(template.format(s = \"SHAPE\", v = \"VOLUME\"))\n",
    "print(\"-\" * 45)\n",
    "\n",
    "template = \"| {s:30} |  {v:6.5f} |\"\n",
    "\n",
    "# sorted by volume, not shape name\n",
    "for shape, volume in sorted(tuple(volumes.items()), key=lambda x: x[1]):\n",
    "    print(template.format(s=shape, v=volume))"
   ]
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