mirror of
https://github.com/rasbt/python_reference.git
synced 2025-01-18 07:17:06 +00:00
defaultdict
This commit is contained in:
rasbt
parent
409d953a22
commit
4d97ce01f2
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@ -1,7 +1,7 @@
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{
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"metadata": {
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"name": "",
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"signature": "sha256:8dc4f91bc6a88e15ab0d25fac35b9a7645a7149b5ab4e1e15b2b372362e82ae2"
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"signature": "sha256:1dc4a14b00afc36bd728a4f8d00ea951e5c9376232218e2e5a36e653e875fbe5"
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},
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"nbformat": 3,
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"nbformat_minor": 0,
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@ -891,6 +891,13 @@
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" d[e] += 1\n",
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" return d\n",
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"\n",
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"def add_element_get(elements):\n",
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" d = dict()\n",
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" for e in elements:\n",
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" d[e] = d.get(e, 1) + 1\n",
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" return d\n",
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"\n",
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"\n",
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"random.seed(123)\n",
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"\n",
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"print('Results for 100 integers in range 1-10') \n",
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@ -899,6 +906,7 @@
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"%timeit add_element_check2(rand_ints)\n",
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"%timeit add_element_except(rand_ints)\n",
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"%timeit add_element_defaultdict(rand_ints)\n",
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"%timeit add_element_get(rand_ints)\n",
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"\n",
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"print('\\nResults for 1000 integers in range 1-5') \n",
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"rand_ints = [random.randrange(1, 5) for i in range(1000)]\n",
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@ -906,13 +914,15 @@
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"%timeit add_element_check2(rand_ints)\n",
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"%timeit add_element_except(rand_ints)\n",
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"%timeit add_element_defaultdict(rand_ints)\n",
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"%timeit add_element_get(rand_ints)\n",
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"\n",
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"print('\\nResults for 1000 integers in range 1-1000') \n",
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"rand_ints = [random.randrange(1, 1000) for i in range(1000)]\n",
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"%timeit add_element_check1(rand_ints)\n",
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"%timeit add_element_check2(rand_ints)\n",
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"%timeit add_element_except(rand_ints)\n",
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"%timeit add_element_defaultdict(rand_ints)"
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"%timeit add_element_defaultdict(rand_ints)\n",
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"%timeit add_element_get(rand_ints)"
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],
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"language": "python",
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"metadata": {},
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@ -922,7 +932,7 @@
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"stream": "stdout",
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"text": [
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"Results for 100 integers in range 1-10\n",
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"10000 loops, best of 3: 24.6 \u00b5s per loop"
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"10000 loops, best of 3: 28 \u00b5s per loop"
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]
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},
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{
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@ -938,7 +948,7 @@
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"stream": "stdout",
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"text": [
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"\n",
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"10000 loops, best of 3: 25.4 \u00b5s per loop"
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"10000 loops, best of 3: 26.5 \u00b5s per loop"
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]
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},
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{
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@ -946,7 +956,15 @@
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"stream": "stdout",
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"text": [
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"\n",
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"10000 loops, best of 3: 23 \u00b5s per loop"
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"10000 loops, best of 3: 22.8 \u00b5s per loop"
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]
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},
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{
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"output_type": "stream",
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"stream": "stdout",
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"text": [
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"\n",
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"10000 loops, best of 3: 33.3 \u00b5s per loop"
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]
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},
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{
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@ -956,7 +974,7 @@
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"\n",
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"\n",
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"Results for 1000 integers in range 1-5\n",
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"1000 loops, best of 3: 236 \u00b5s per loop"
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"1000 loops, best of 3: 242 \u00b5s per loop"
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]
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},
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{
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@ -964,7 +982,7 @@
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"stream": "stdout",
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"text": [
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"\n",
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"1000 loops, best of 3: 235 \u00b5s per loop"
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"1000 loops, best of 3: 239 \u00b5s per loop"
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]
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},
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{
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@ -972,7 +990,7 @@
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"stream": "stdout",
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"text": [
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"\n",
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"1000 loops, best of 3: 207 \u00b5s per loop"
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"1000 loops, best of 3: 203 \u00b5s per loop"
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]
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},
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{
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@ -980,7 +998,15 @@
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"stream": "stdout",
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"text": [
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"\n",
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"10000 loops, best of 3: 177 \u00b5s per loop"
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"10000 loops, best of 3: 184 \u00b5s per loop"
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]
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},
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{
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"output_type": "stream",
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"stream": "stdout",
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"text": [
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"\n",
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"1000 loops, best of 3: 350 \u00b5s per loop"
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]
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},
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{
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@ -990,7 +1016,7 @@
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"\n",
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"\n",
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"Results for 1000 integers in range 1-1000\n",
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"1000 loops, best of 3: 268 \u00b5s per loop"
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"1000 loops, best of 3: 262 \u00b5s per loop"
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]
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},
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{
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@ -998,7 +1024,7 @@
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"stream": "stdout",
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"text": [
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"\n",
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"1000 loops, best of 3: 377 \u00b5s per loop"
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"1000 loops, best of 3: 370 \u00b5s per loop"
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]
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},
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{
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@ -1006,7 +1032,7 @@
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"stream": "stdout",
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"text": [
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"\n",
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"1000 loops, best of 3: 511 \u00b5s per loop"
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"1000 loops, best of 3: 502 \u00b5s per loop"
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]
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},
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{
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@ -1014,7 +1040,15 @@
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"stream": "stdout",
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"text": [
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"\n",
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"1000 loops, best of 3: 410 \u00b5s per loop"
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"1000 loops, best of 3: 422 \u00b5s per loop"
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]
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},
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{
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"output_type": "stream",
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"stream": "stdout",
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"text": [
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"\n",
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"1000 loops, best of 3: 373 \u00b5s per loop"
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]
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},
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{
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@ -1025,7 +1059,32 @@
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]
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}
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],
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"prompt_number": 16
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"prompt_number": 25
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},
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{
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"cell_type": "code",
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"collapsed": false,
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"input": [
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"def add_element_get(elements):\n",
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" d = dict()\n",
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" for e in elements:\n",
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" d[e] = d.get(e, 1) + 1\n",
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" return d\n",
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"\n",
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"print(add_element_get(rand_ints))"
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],
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"language": "python",
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"metadata": {},
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"outputs": [
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{
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"output_type": "stream",
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"stream": "stdout",
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"text": [
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"{1: 17, 2: 10, 3: 11, 4: 7, 5: 9, 6: 14, 7: 13, 8: 13, 9: 15}\n"
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]
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}
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],
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"prompt_number": 24
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},
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{
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"cell_type": "markdown",
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{
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"metadata": {
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"name": "",
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"signature": "sha256:8dc4f91bc6a88e15ab0d25fac35b9a7645a7149b5ab4e1e15b2b372362e82ae2"
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"signature": "sha256:1dc4a14b00afc36bd728a4f8d00ea951e5c9376232218e2e5a36e653e875fbe5"
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},
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"nbformat": 3,
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"nbformat_minor": 0,
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@ -891,6 +891,13 @@
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" d[e] += 1\n",
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" return d\n",
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"\n",
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"def add_element_get(elements):\n",
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" d = dict()\n",
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" for e in elements:\n",
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" d[e] = d.get(e, 1) + 1\n",
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" return d\n",
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"\n",
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"\n",
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"random.seed(123)\n",
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"\n",
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"print('Results for 100 integers in range 1-10') \n",
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"%timeit add_element_check2(rand_ints)\n",
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"%timeit add_element_except(rand_ints)\n",
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"%timeit add_element_defaultdict(rand_ints)\n",
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"%timeit add_element_get(rand_ints)\n",
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"\n",
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"print('\\nResults for 1000 integers in range 1-5') \n",
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"rand_ints = [random.randrange(1, 5) for i in range(1000)]\n",
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@ -906,13 +914,15 @@
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"%timeit add_element_check2(rand_ints)\n",
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"%timeit add_element_except(rand_ints)\n",
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"%timeit add_element_defaultdict(rand_ints)\n",
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"%timeit add_element_get(rand_ints)\n",
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"\n",
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"print('\\nResults for 1000 integers in range 1-1000') \n",
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"rand_ints = [random.randrange(1, 1000) for i in range(1000)]\n",
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"%timeit add_element_check1(rand_ints)\n",
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"%timeit add_element_check2(rand_ints)\n",
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"%timeit add_element_except(rand_ints)\n",
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"%timeit add_element_defaultdict(rand_ints)"
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"%timeit add_element_defaultdict(rand_ints)\n",
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"%timeit add_element_get(rand_ints)"
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],
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"language": "python",
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"metadata": {},
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@ -922,7 +932,7 @@
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"stream": "stdout",
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"text": [
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"Results for 100 integers in range 1-10\n",
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"10000 loops, best of 3: 24.6 \u00b5s per loop"
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"10000 loops, best of 3: 28 \u00b5s per loop"
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]
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},
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{
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@ -938,7 +948,7 @@
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"stream": "stdout",
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"text": [
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"\n",
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"10000 loops, best of 3: 25.4 \u00b5s per loop"
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"10000 loops, best of 3: 26.5 \u00b5s per loop"
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]
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},
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{
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@ -946,7 +956,15 @@
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"stream": "stdout",
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"text": [
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"\n",
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"10000 loops, best of 3: 23 \u00b5s per loop"
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"10000 loops, best of 3: 22.8 \u00b5s per loop"
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]
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},
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{
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"output_type": "stream",
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"stream": "stdout",
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"text": [
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"\n",
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"10000 loops, best of 3: 33.3 \u00b5s per loop"
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]
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},
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{
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@ -956,7 +974,7 @@
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"\n",
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"\n",
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"Results for 1000 integers in range 1-5\n",
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"1000 loops, best of 3: 236 \u00b5s per loop"
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"1000 loops, best of 3: 242 \u00b5s per loop"
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]
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},
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{
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@ -964,7 +982,7 @@
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"stream": "stdout",
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"text": [
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"\n",
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"1000 loops, best of 3: 235 \u00b5s per loop"
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"1000 loops, best of 3: 239 \u00b5s per loop"
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]
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},
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{
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@ -972,7 +990,7 @@
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"stream": "stdout",
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"text": [
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"\n",
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"1000 loops, best of 3: 207 \u00b5s per loop"
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"1000 loops, best of 3: 203 \u00b5s per loop"
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]
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},
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{
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@ -980,7 +998,15 @@
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"stream": "stdout",
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"text": [
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"\n",
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"10000 loops, best of 3: 177 \u00b5s per loop"
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"10000 loops, best of 3: 184 \u00b5s per loop"
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]
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},
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{
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"output_type": "stream",
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"stream": "stdout",
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"text": [
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"\n",
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"1000 loops, best of 3: 350 \u00b5s per loop"
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]
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},
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{
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@ -990,7 +1016,7 @@
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"\n",
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"\n",
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"Results for 1000 integers in range 1-1000\n",
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"1000 loops, best of 3: 268 \u00b5s per loop"
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"1000 loops, best of 3: 262 \u00b5s per loop"
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]
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},
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{
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@ -998,7 +1024,7 @@
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"stream": "stdout",
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"text": [
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"\n",
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"1000 loops, best of 3: 377 \u00b5s per loop"
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"1000 loops, best of 3: 370 \u00b5s per loop"
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]
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},
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{
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@ -1006,7 +1032,7 @@
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"stream": "stdout",
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"text": [
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"\n",
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"1000 loops, best of 3: 511 \u00b5s per loop"
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"1000 loops, best of 3: 502 \u00b5s per loop"
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]
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},
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{
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@ -1014,7 +1040,15 @@
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"stream": "stdout",
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"text": [
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"\n",
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"1000 loops, best of 3: 410 \u00b5s per loop"
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"1000 loops, best of 3: 422 \u00b5s per loop"
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]
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},
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{
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"output_type": "stream",
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"stream": "stdout",
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"text": [
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"\n",
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"1000 loops, best of 3: 373 \u00b5s per loop"
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]
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},
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{
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]
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}
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],
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"prompt_number": 16
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"prompt_number": 25
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},
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{
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"cell_type": "code",
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"collapsed": false,
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"input": [
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"def add_element_get(elements):\n",
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" d = dict()\n",
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" for e in elements:\n",
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" d[e] = d.get(e, 1) + 1\n",
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" return d\n",
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"\n",
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"print(add_element_get(rand_ints))"
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],
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"language": "python",
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"metadata": {},
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"outputs": [
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{
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"output_type": "stream",
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"stream": "stdout",
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"text": [
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"{1: 17, 2: 10, 3: 11, 4: 7, 5: 9, 6: 14, 7: 13, 8: 13, 9: 15}\n"
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]
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}
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],
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"prompt_number": 24
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},
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{
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"cell_type": "markdown",
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Loading…
Reference in New Issue
Block a user