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Added snippet for generator expressions.

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Donne Martin 2015-01-27 12:58:50 -05:00
parent 97c7118117
commit 7c5609f1e2
1 changed files with 37 additions and 3 deletions
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40
core/functions.ipynb
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@ -1,7 +1,7 @@
{ {
"metadata": { "metadata": {
"name": "", "name": "",
"signature": "sha256:a81c81558508aed1c6f336342652e5f8dcc250ecd9f9f955b9e6e02d65a45c5c" "signature": "sha256:d9c538ef6dad540e5963356ed91d625e86a9a447c42edc8d3fe3a76031768782"
}, },
"nbformat": 3, "nbformat": 3,
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@ -452,8 +452,8 @@
"collapsed": false, "collapsed": false,
"input": [ "input": [
"def squares(n=5):\n", "def squares(n=5):\n",
" for i in xrange(1, n + 1):\n", " for x in xrange(1, n + 1):\n",
" yield i ** 2\n", " yield x ** 2\n",
"\n", "\n",
"# No code is executed\n", "# No code is executed\n",
"gen = squares()\n", "gen = squares()\n",
@ -478,6 +478,40 @@
} }
], ],
"prompt_number": 10 "prompt_number": 10
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Generator Expressions\n",
"\n",
"A generator expression is analogous to a comprehension. A list comprehension is enclosed by [], a generator expression is enclosed by ():"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"gen = (x ** 2 for x in xrange(1, 6))\n",
"for x in gen:\n",
" print x"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"1\n",
"4\n",
"9\n",
"16\n",
"25\n"
]
}
],
"prompt_number": 11
} }
], ],
"metadata": {} "metadata": {}