Chapter-02-Advanced-Topics.ipynb

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    "%matplotlib widget\n",
    "from sympy import *\n",
    "init_printing(use_latex=True)"
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    "## 2.7 - Advanced Topics"
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    "### 2.7.1 - Module sympy.abc"
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    "from sympy.abc import _clash\n",
    "_clash"
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   "source": [
    "### 2.7.3 - The class Symbol and the concept of Immutability"
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    "x1 = Symbol(\"x\")\n",
    "x2 = Symbol(\"x\", real=True)\n",
    "hc1 = x1._hashable_content()\n",
    "hc2 = x2._hashable_content()\n",
    "print(hc1)\n",
    "print(hc2)"
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    "print(hash(hc1))\n",
    "print(hash(hc2))"
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    "print(x1._mhash)\n",
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    "print(x1 == x2)\n",
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    "print(x2._mhash)"
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    "y1 = Symbol(\"y\")\n",
    "y2 = Symbol(\"z\")"
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    "d1 = {\n",
    "    y1: 10,\n",
    "    y2: 20\n",
    "}\n",
    "print(y1._mhash)\n",
    "print(y2._mhash)\n",
    "display(d1)"
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  },
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   "outputs": [],
   "source": [
    "y2.name = \"y\"\n",
    "y2"
   ]
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  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "print(y1 == y2, y1.equals(y2))\n",
    "print(y1._mhash)\n",
    "print(y2._mhash)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "d2 = {\n",
    "    y1: 10,\n",
    "    y2: 20\n",
    "}\n",
    "display(d2)"
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