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Added snippet for range and xrange.

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Donne Martin 2015-01-25 06:02:30 -05:00
parent 09fb505a19
commit a3ca7175e5
1 changed files with 121 additions and 11 deletions
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132
core/basics.ipynb
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{
"cell_type": "markdown",
"metadata": {},
"source": [
"## range and xrange"
]
},
{
"cell_type": "code",
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"input": [
"# Note: range is no longer avalable in Python 3\n",
"# Generate a list of evenly spaced integers\n",
"range(10)"
],
"language": "python",
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"[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]"
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"input": [
"# Range can take start, stop, and step arguments\n",
"range(0, 20, 3)"
],
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"[0, 3, 6, 9, 12, 15, 18]"
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"input": [
"# It is very common to iterate through sequences by index with range\n",
"seq = [1, 2, 3]\n",
"for i in range(len(seq)):\n",
" val = seq[i]\n",
" print(val)"
],
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{
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"stream": "stdout",
"text": [
"1\n",
"2\n",
"3\n"
]
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"input": [
"# xrange is recommended for longer ranges and is available in Python 3 as \n",
"# range. It returns an iterator that generates integers one by one rather\n",
"# than all at once and storing them in a large list.\n",
"sum = 0\n",
"for i in xrange(100000):\n",
" if i % 2 == 0:\n",
" sum += 1\n",
"print(sum)"
],
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"metadata": {},
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{
"output_type": "stream",
"stream": "stdout",
"text": [
"50000\n"
]
}
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