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   "source": [
    "### <center>San Jose State University<br>Department of Applied Data Science<br><br>**DATA 200<br>Computational Programming for Data Analytics**<br><br>Spring 2024<br>Instructor: Ron Mak</center>"
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    "# Generator Expressions\n",
    "#### A ***generator expression*** is similar to a list comprehension, but it creates instead an iterable ***generator object*** that produces values on demand. This an example of the concept of ***lazy evaluation***."
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    "values = list(range(20))\n",
    "values"
   ]
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   "source": [
    "### List comprehension: Enclose in square brackets `[` and `]`."
   ]
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   "id": "67ab1320-e906-412c-b4ad-1dfe68ebdf90",
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    "squares_of_evens = [v*v for v in values if v%2 == 0]\n",
    "squares_of_evens"
   ]
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  {
   "cell_type": "markdown",
   "id": "9314dba5-c72b-492d-96c1-24e03163525e",
   "metadata": {},
   "source": [
    "### Generator: Enclose in parentheses `(` and `)`."
   ]
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  {
   "cell_type": "code",
   "execution_count": null,
   "id": "0e06304b-a34b-4bc8-a7cf-94c993380c33",
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   "source": [
    "squares_of_odds = (v*v for v in values if v%2 != 0)\n",
    "squares_of_odds"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "4a8dced8-1902-4fc1-830e-c26f0d6e8de6",
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   "source": [
    "for s in squares_of_odds:\n",
    "    print(s)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "fd42df0e-2f87-4098-afb7-f9a3c5520c85",
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   "outputs": [],
   "source": [
    "for s in squares_of_odds:\n",
    "    print(s)"
   ]
  },
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   "cell_type": "markdown",
   "id": "cf250e8f-e09d-443b-82d4-56fe789f6d45",
   "metadata": {},
   "source": [
    "#### (c) 2023 by Ronald Mak"
   ]
  },
  {
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   "execution_count": null,
   "id": "7384ca06-a376-43cf-8f5e-46332ec38e9c",
   "metadata": {},
   "outputs": [],
   "source": []
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