mathdatech/python_reference
1
0
Fork 0
mirror of https://github.com/rasbt/python_reference.git synced 2025-02-17 13:58:13 +00:00
Code Issues Packages Projects Releases Wiki Activity

list reverse

Browse Source
This commit is contained in:
rasbt 2014-04-13 19:44:19 -04:00
parent d4c466134d
commit 42f06f8252
2 changed files with 162 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

82
.ipynb_checkpoints/timeit_test-checkpoint.ipynb
View File

@ -1,13 +1,20 @@
{
"metadata": {
"name": "",
"signature": "sha256:c78a9ef71605847c90e18bf10abda603339de473905dc928bd17aacd1ae5bee9"
"signature": "sha256:30bb811f79dc78fe63221c8960bb4237c811b94fdf197b6479709aff3244cb08"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"# Python benchmarks via `timeit`"
]
},
{
"cell_type": "markdown",
"metadata": {},
@ -74,6 +81,8 @@
"cell_type": "code",
"collapsed": false,
"input": [
"import timeit\n",
"\n",
"def reverse_join(my_str):\n",
" return ''.join(reversed(my_str))\n",
" \n",
@ -115,6 +124,77 @@
}
],
"prompt_number": 13
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"### List Reversing - `[::-1]` vs. `reverse()` vs. `reversed()`"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import timeit\n",
"\n",
"def reverse_func(my_list):\n",
" new_list = my_list[:]\n",
" new_list.reverse()\n",
" return new_list\n",
" \n",
"def reversed_func(my_list):\n",
" return list(reversed(my_list))\n",
"\n",
"def reverse_slizing(my_list):\n",
" return my_list[::-1]\n",
"\n",
"%timeit reverse_func([1,2,3,4,5])\n",
"%timeit reversed_func([1,2,3,4,5])\n",
"%timeit reverse_slizing([1,2,3,4,5])\n",
"\n",
"# Python 3.4.0\n",
"# MacOS X 10.9.2\n",
"# 2.4 GHz Intel Core Duo\n",
"# 8 GB 1067 Mhz DDR3\n",
"#"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"1000000 loops, best of 3: 857 ns per loop\n",
"1000000 loops, best of 3: 1.78 \u00b5s per loop"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n",
"1000000 loops, best of 3: 758 ns per loop"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n"
]
}
],
"prompt_number": 10
},
{
"cell_type": "code",
"collapsed": false,
"input": [],
"language": "python",
"metadata": {},
"outputs": []
}
],
"metadata": {}

82
timeit_test.ipynb
View File

@ -1,13 +1,20 @@
{
"metadata": {
"name": "",
"signature": "sha256:c78a9ef71605847c90e18bf10abda603339de473905dc928bd17aacd1ae5bee9"
"signature": "sha256:30bb811f79dc78fe63221c8960bb4237c811b94fdf197b6479709aff3244cb08"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"# Python benchmarks via `timeit`"
]
},
{
"cell_type": "markdown",
"metadata": {},
@ -74,6 +81,8 @@
"cell_type": "code",
"collapsed": false,
"input": [
"import timeit\n",
"\n",
"def reverse_join(my_str):\n",
" return ''.join(reversed(my_str))\n",
" \n",
@ -115,6 +124,77 @@
}
],
"prompt_number": 13
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"### List Reversing - `[::-1]` vs. `reverse()` vs. `reversed()`"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import timeit\n",
"\n",
"def reverse_func(my_list):\n",
" new_list = my_list[:]\n",
" new_list.reverse()\n",
" return new_list\n",
" \n",
"def reversed_func(my_list):\n",
" return list(reversed(my_list))\n",
"\n",
"def reverse_slizing(my_list):\n",
" return my_list[::-1]\n",
"\n",
"%timeit reverse_func([1,2,3,4,5])\n",
"%timeit reversed_func([1,2,3,4,5])\n",
"%timeit reverse_slizing([1,2,3,4,5])\n",
"\n",
"# Python 3.4.0\n",
"# MacOS X 10.9.2\n",
"# 2.4 GHz Intel Core Duo\n",
"# 8 GB 1067 Mhz DDR3\n",
"#"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"1000000 loops, best of 3: 857 ns per loop\n",
"1000000 loops, best of 3: 1.78 \u00b5s per loop"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n",
"1000000 loops, best of 3: 758 ns per loop"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n"
]
}
],
"prompt_number": 10
},
{
"cell_type": "code",
"collapsed": false,
"input": [],
"language": "python",
"metadata": {},
"outputs": []
}
],
"metadata": {}