chp3_Ipython.ipynb

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    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "sum?"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 1
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "sum??"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 2
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "type??"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 3
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import numpy as np"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 4
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "np.*load*?"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 6
    },
    {
     "cell_type": "heading",
     "level": 6,
     "metadata": {},
     "source": [
      "CTRL - SHIFT - V: executing code from the clipboard"
     ]
    },
    {
     "cell_type": "heading",
     "level": 4,
     "metadata": {},
     "source": [
      "magic functions"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "a = np.random.randn(100,100)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 9
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "timeit np.dot(a,a)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "10000 loops, best of 3: 86.1 \u00b5s per loop\n"
       ]
      }
     ],
     "prompt_number": 10
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "reset?"
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     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 11
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "magic"
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     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 12
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "quickref"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 13
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "who_ls"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 16,
       "text": [
        "['a', 'np']"
       ]
      }
     ],
     "prompt_number": 16
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "hist"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "sum?\n",
        "sum??\n",
        "type??\n",
        "import numpy as np\n",
        "np.*load*\n",
        "np.*load*?\n",
        "%paste\n",
        "a = np,random.randn(100,100)\n",
        "a = np.random.randn(100,100)\n",
        "timeit np.dot(a,a)\n",
        "reset?\n",
        "magic\n",
        "quickref\n",
        "who\n",
        "whos\n",
        "who_ls\n",
        "hist\n"
       ]
      }
     ],
     "prompt_number": 17
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "gui"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 18
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "3*4"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 19,
       "text": [
        "12"
       ]
      }
     ],
     "prompt_number": 19
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    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "_"
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     "metadata": {},
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      {
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 20,
       "text": [
        "12"
       ]
      }
     ],
     "prompt_number": 20
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "foo='bar'"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 21
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    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "_i21"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 22,
       "text": [
        "u\"foo='bar'\""
       ]
      }
     ],
     "prompt_number": 22
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "_22"
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     "metadata": {},
     "outputs": [
      {
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 26,
       "text": [
        "u\"foo='bar'\""
       ]
      }
     ],
     "prompt_number": 26
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "exec _i21"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 27
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "logstart"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Activating auto-logging. Current session state plus future input saved.\n",
        "Filename       : ipython_log.py\n",
        "Mode           : rotate\n",
        "Output logging : False\n",
        "Raw input log  : False\n",
        "Timestamping   : False\n",
        "State          : active\n"
       ]
      }
     ],
     "prompt_number": 28
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "!ls"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "README.md                        chp3_Ipython.ipynb\r\n",
        "chp2_Introductory_examples.ipynb ipython_log.py\r\n"
       ]
      }
     ],
     "prompt_number": 29
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "!whoami"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "sergulaydore\r\n"
       ]
      }
     ],
     "prompt_number": 30
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "ip_info = !ifconfig | grep \"inet \""
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 41
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "ip_info[0].strip()"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 44,
       "text": [
        "'inet 127.0.0.1 netmask 0xff000000'"
       ]
      }
     ],
     "prompt_number": 44
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "foo='c*'"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 45
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "!ls $foo"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "chp2_Introductory_examples.ipynb chp3_Ipython.ipynb\r\n"
       ]
      }
     ],
     "prompt_number": 46
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "%alias ll ls -l"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 47
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "ll /usr"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "total 16\r\n",
        "drwxr-xr-x     5 root  wheel    170 Sep  9 17:41 \u001b[34mX11\u001b[m\u001b[m\r\n",
        "lrwxr-xr-x     1 root  wheel      3 Feb 22 20:16 \u001b[35mX11R6\u001b[m\u001b[m -> X11\r\n",
        "drwxr-xr-x  1048 root  wheel  35632 Feb 22 21:10 \u001b[34mbin\u001b[m\u001b[m\r\n",
        "drwxr-xr-x   251 root  wheel   8534 Feb 22 21:12 \u001b[34mlib\u001b[m\u001b[m\r\n",
        "drwxr-xr-x   170 root  wheel   5780 Feb 22 21:16 \u001b[34mlibexec\u001b[m\u001b[m\r\n",
        "drwxr-xr-x     6 root  wheel    204 Feb 22 20:22 \u001b[34mlocal\u001b[m\u001b[m\r\n",
        "drwxr-xr-x   243 root  wheel   8262 Feb 22 20:15 \u001b[34msbin\u001b[m\u001b[m\r\n",
        "drwxr-xr-x    43 root  wheel   1462 Feb 22 20:15 \u001b[34mshare\u001b[m\u001b[m\r\n",
        "drwxr-xr-x     4 root  wheel    136 Feb 22 20:11 \u001b[34mstandalone\u001b[m\u001b[m\r\n",
        "lrwxr-xr-x     1 root  wheel     44 Sep 18 12:18 \u001b[35mtexbin\u001b[m\u001b[m -> ../Library/TeX/Distributions/Programs/texbin\r\n"
       ]
      }
     ],
     "prompt_number": 48
    },
    {
     "cell_type": "heading",
     "level": 3,
     "metadata": {},
     "source": [
      "Directory bookmarking system"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "%bookmark db ../Dropbox"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 49
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "cd db"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "(bookmark:db) -> ../Dropbox\n",
        "/Users/sergulaydore/Dropbox\n"
       ]
      }
     ],
     "prompt_number": 50
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "%bookmark -l"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Current bookmarks:\n",
        "db -> ../Dropbox\n"
       ]
      }
     ],
     "prompt_number": 51
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Timing Code"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import time"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 1
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "strings = ['foo','foobar','baz','qux',\n",
      "           'python', 'Guido Van Rossum']*100000 # a very large list of strings"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 2
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "%time method1 = [x for x in strings if x.startswith('foo')]"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "CPU times: user 213 ms, sys: 11.2 ms, total: 224 ms\n",
        "Wall time: 219 ms\n"
       ]
      }
     ],
     "prompt_number": 4
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "%time method2 = [x for x in strings if x[:3]=='foo']"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "CPU times: user 114 ms, sys: 17.9 ms, total: 132 ms\n",
        "Wall time: 121 ms\n"
       ]
      }
     ],
     "prompt_number": 5
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "%timeit method1 = [x for x in strings if x.startswith('foo')]"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "1 loops, best of 3: 164 ms per loop\n"
       ]
      }
     ],
     "prompt_number": 6
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "%timeit method2 = [x for x in strings if x[:3]=='foo']"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "10 loops, best of 3: 57.3 ms per loop\n"
       ]
      }
     ],
     "prompt_number": 7
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Basic Profiling "
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "python -m cProfile cprof_example.py"
     ],
     "language": "python",
     "metadata": {},
     "outputs": []
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "python -m cProfile -s cumulative cprof_example.py"
     ],
     "language": "python",
     "metadata": {},
     "outputs": []
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "%prun -l 7 -s cumulative run_experiment()"
     ],
     "language": "python",
     "metadata": {},
     "outputs": []
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Making Your Own CLasses IPython friendly"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "class Message:\n",
      "    def __init__(self, msg):\n",
      "        self.msg = msg"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 8
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "x = Message('I have a secret')"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 9
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "x"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 10,
       "text": [
        "<__main__.Message instance at 0x10445f248>"
       ]
      }
     ],
     "prompt_number": 10
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "class Message:\n",
      "    def __init__(self,msg):\n",
      "        self.msg = msg\n",
      "    def __repr__(self):\n",
      "        return 'Message: %s' %self.msg"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 11
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "x=Message('I have a secret')"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 12
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "x"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 13,
       "text": [
        "Message: I have a secret"
       ]
      }
     ],
     "prompt_number": 13
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [],
     "language": "python",
     "metadata": {},
     "outputs": []
    }
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   "metadata": {}
  }
 ]
}