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find copy

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rasbt 2014-04-26 01:15:18 -04:00
parent cf64608760
commit 31fd245fb0
2 changed files with 288 additions and 18 deletions
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167
.ipynb_checkpoints/timeit_tests-checkpoint.ipynb
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@ -1,7 +1,7 @@
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@ -64,7 +64,8 @@
" - [Creating lists using conditional statements](#create_cond_list)\n", " - [Creating lists using conditional statements](#create_cond_list)\n",
"- [Dictionary operations](#dict_ops) \n", "- [Dictionary operations](#dict_ops) \n",
" - [Adding elements to a dictionary](#adding_dict_elements)\n", " - [Adding elements to a dictionary](#adding_dict_elements)\n",
"- [Comprehensions vs. for-loops](#comprehensions)" "- [Comprehensions vs. for-loops](#comprehensions)\n",
"- [Copying files by searching directory trees](#find_copy)"
] ]
}, },
{ {
@ -1023,6 +1024,14 @@
"# Comprehesions vs. for-loops" "# Comprehesions vs. for-loops"
] ]
}, },
{
"cell_type": "markdown",
"metadata": {},
"source": [
"Comprehensions are not only shorter and prettier than ye goode olde for-loop, \n",
"but they are also up to ~1.2x faster."
]
},
{ {
"cell_type": "code", "cell_type": "code",
"collapsed": false, "collapsed": false,
@ -1126,7 +1135,7 @@
"language": "python", "language": "python",
"metadata": {}, "metadata": {},
"outputs": [], "outputs": [],
"prompt_number": 11 "prompt_number": 23
}, },
{ {
"cell_type": "code", "cell_type": "code",
@ -1138,7 +1147,7 @@
"language": "python", "language": "python",
"metadata": {}, "metadata": {},
"outputs": [], "outputs": [],
"prompt_number": 12 "prompt_number": 24
}, },
{ {
"cell_type": "code", "cell_type": "code",
@ -1154,8 +1163,8 @@
"output_type": "stream", "output_type": "stream",
"stream": "stdout", "stream": "stdout",
"text": [ "text": [
"10000 loops, best of 3: 130 \u00b5s per loop\n", "10000 loops, best of 3: 129 \u00b5s per loop\n",
"10000 loops, best of 3: 114 \u00b5s per loop" "10000 loops, best of 3: 111 \u00b5s per loop"
] ]
}, },
{ {
@ -1166,7 +1175,7 @@
] ]
} }
], ],
"prompt_number": 14 "prompt_number": 25
}, },
{ {
"cell_type": "markdown", "cell_type": "markdown",
@ -1189,7 +1198,7 @@
"language": "python", "language": "python",
"metadata": {}, "metadata": {},
"outputs": [], "outputs": [],
"prompt_number": 15 "prompt_number": 26
}, },
{ {
"cell_type": "code", "cell_type": "code",
@ -1201,7 +1210,7 @@
"language": "python", "language": "python",
"metadata": {}, "metadata": {},
"outputs": [], "outputs": [],
"prompt_number": 17 "prompt_number": 27
}, },
{ {
"cell_type": "code", "cell_type": "code",
@ -1217,8 +1226,8 @@
"output_type": "stream", "output_type": "stream",
"stream": "stdout", "stream": "stdout",
"text": [ "text": [
"10000 loops, best of 3: 120 \u00b5s per loop\n", "10000 loops, best of 3: 121 \u00b5s per loop\n",
"10000 loops, best of 3: 118 \u00b5s per loop" "10000 loops, best of 3: 127 \u00b5s per loop"
] ]
}, },
{ {
@ -1229,15 +1238,145 @@
] ]
} }
], ],
"prompt_number": 18 "prompt_number": 28
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"<a name=\"find_copy\"></a>\n",
"<br>\n",
"<br>"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"# Copying files by searching directory trees"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"Executing `Unix`/`Linux` shell commands:"
]
}, },
{ {
"cell_type": "code", "cell_type": "code",
"collapsed": false, "collapsed": false,
"input": [], "input": [
"import subprocess\n",
"\n",
"def subprocess_findcopy(path, search_str, dest): \n",
" query = 'find %s -name \"%s\" -exec cp {}\" %s \\;' %(path, search_str, dest)\n",
" subprocess.call(query, shell=True)\n",
" return "
],
"language": "python", "language": "python",
"metadata": {}, "metadata": {},
"outputs": [] "outputs": [],
"prompt_number": 2
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"Using Python's `os.walk()` to search the directory tree recursively and matching patterns via `fnmatch.filter()`"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import shutil\n",
"import os\n",
"import fnmatch\n",
"\n",
"def walk_findcopy(path, search_str, dest):\n",
" for path, subdirs, files in os.walk(path):\n",
" for name in fnmatch.filter(files, search_str):\n",
" shutil.copy(os.path.join(path,name), dest)"
],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 3
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import timeit\n",
"\n",
"print('small tree')\n",
"inpath = '/Users/sebastian/Desktop/testdir_in'\n",
"outpath = '/Users/sebastian/Desktop/testdir_out'\n",
"searchstr = '*.png'\n",
"%timeit subprocess_findcopy(inpath, searchstr, outpath)\n",
"%timeit walk_findcopy(inpath, searchstr, outpath)\n",
"\n",
"print('\\nlarger tree')\n",
"inpath = '/Users/sebastian/Dropbox'\n",
"outpath = '/Users/sebastian/Desktop/testdir_out'\n",
"searchstr = '*.csv'\n",
"%timeit subprocess_findcopy(inpath, searchstr, outpath)\n",
"%timeit walk_findcopy(inpath, searchstr, outpath)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"small tree\n",
"100 loops, best of 3: 8.48 ms per loop"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n",
"100 loops, best of 3: 22.3 ms per loop"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n",
"\n",
"larger tree\n",
"10 loops, best of 3: 7.13 ms per loop"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n",
"1 loops, best of 3: 413 ms per loop"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n"
]
}
],
"prompt_number": 4
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"I have to say that I am really positvively surprised. The shell's `find` scales even better than expected!"
]
} }
], ],
"metadata": {} "metadata": {}

139
benchmarks/timeit_tests.ipynb
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@ -1,7 +1,7 @@
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"nbformat": 3, "nbformat": 3,
"nbformat_minor": 0, "nbformat_minor": 0,
@ -64,7 +64,8 @@
" - [Creating lists using conditional statements](#create_cond_list)\n", " - [Creating lists using conditional statements](#create_cond_list)\n",
"- [Dictionary operations](#dict_ops) \n", "- [Dictionary operations](#dict_ops) \n",
" - [Adding elements to a dictionary](#adding_dict_elements)\n", " - [Adding elements to a dictionary](#adding_dict_elements)\n",
"- [Comprehensions vs. for-loops](#comprehensions)" "- [Comprehensions vs. for-loops](#comprehensions)\n",
"- [Copying files by searching directory trees](#find_copy)"
] ]
}, },
{ {
@ -1239,13 +1240,143 @@
], ],
"prompt_number": 28 "prompt_number": 28
}, },
{
"cell_type": "markdown",
"metadata": {},
"source": [
"<a name=\"find_copy\"></a>\n",
"<br>\n",
"<br>"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"# Copying files by searching directory trees"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"Executing `Unix`/`Linux` shell commands:"
]
},
{ {
"cell_type": "code", "cell_type": "code",
"collapsed": false, "collapsed": false,
"input": [], "input": [
"import subprocess\n",
"\n",
"def subprocess_findcopy(path, search_str, dest): \n",
" query = 'find %s -name \"%s\" -exec cp {}\" %s \\;' %(path, search_str, dest)\n",
" subprocess.call(query, shell=True)\n",
" return "
],
"language": "python", "language": "python",
"metadata": {}, "metadata": {},
"outputs": [] "outputs": [],
"prompt_number": 2
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"Using Python's `os.walk()` to search the directory tree recursively and matching patterns via `fnmatch.filter()`"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import shutil\n",
"import os\n",
"import fnmatch\n",
"\n",
"def walk_findcopy(path, search_str, dest):\n",
" for path, subdirs, files in os.walk(path):\n",
" for name in fnmatch.filter(files, search_str):\n",
" shutil.copy(os.path.join(path,name), dest)"
],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 3
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import timeit\n",
"\n",
"print('small tree')\n",
"inpath = '/Users/sebastian/Desktop/testdir_in'\n",
"outpath = '/Users/sebastian/Desktop/testdir_out'\n",
"searchstr = '*.png'\n",
"%timeit subprocess_findcopy(inpath, searchstr, outpath)\n",
"%timeit walk_findcopy(inpath, searchstr, outpath)\n",
"\n",
"print('\\nlarger tree')\n",
"inpath = '/Users/sebastian/Dropbox'\n",
"outpath = '/Users/sebastian/Desktop/testdir_out'\n",
"searchstr = '*.csv'\n",
"%timeit subprocess_findcopy(inpath, searchstr, outpath)\n",
"%timeit walk_findcopy(inpath, searchstr, outpath)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"small tree\n",
"100 loops, best of 3: 8.48 ms per loop"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n",
"100 loops, best of 3: 22.3 ms per loop"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n",
"\n",
"larger tree\n",
"10 loops, best of 3: 7.13 ms per loop"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n",
"1 loops, best of 3: 413 ms per loop"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n"
]
}
],
"prompt_number": 4
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"I have to say that I am really positvively surprised. The shell's `find` scales even better than expected!"
]
} }
], ],
"metadata": {} "metadata": {}