check_env.ipynb

{
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   "cell_type": "code",
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   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Using python in /home/andy/anaconda3\n",
      "3.5.2 |Continuum Analytics, Inc.| (default, Jul  2 2016, 17:53:06) \n",
      "[GCC 4.4.7 20120313 (Red Hat 4.4.7-1)]\n",
      "\n",
      "\u001b[42m[ OK ]\u001b[0m sklearn version 0.19.dev0\n",
      "\u001b[42m[ OK ]\u001b[0m matplotlib version 2.0.0\n",
      "\u001b[42m[ OK ]\u001b[0m PIL version 1.1.7\n",
      "\u001b[42m[ OK ]\u001b[0m pandas version 0.19.2\n",
      "\u001b[42m[ OK ]\u001b[0m IPython version 5.1.0\n",
      "\u001b[42m[ OK ]\u001b[0m numpy version 1.12.1\n",
      "\u001b[42m[ OK ]\u001b[0m scipy version 0.19.0\n"
     ]
    }
   ],
   "source": [
    "from __future__ import print_function\n",
    "from distutils.version import LooseVersion as Version\n",
    "import sys\n",
    "\n",
    "\n",
    "\n",
    "OK = '\\x1b[42m[ OK ]\\x1b[0m'\n",
    "FAIL = \"\\x1b[41m[FAIL]\\x1b[0m\"\n",
    "\n",
    "try:\n",
    "    import importlib\n",
    "except ImportError:\n",
    "    print(FAIL, \"Python version 3.4 (or 2.7) is required,\"\n",
    "                \" but %s is installed.\" % sys.version)\n",
    "\n",
    "    \n",
    "def import_version(pkg, min_ver, fail_msg=\"\"):\n",
    "    mod = None\n",
    "    try:\n",
    "        mod = importlib.import_module(pkg)\n",
    "        if pkg in {'PIL'}:\n",
    "            ver = mod.VERSION\n",
    "        else:\n",
    "            ver = mod.__version__\n",
    "        if Version(ver) < min_ver:\n",
    "            print(FAIL, \"%s version %s or higher required, but %s installed.\"\n",
    "                  % (lib, min_ver, ver))\n",
    "        else:\n",
    "            print(OK, '%s version %s' % (pkg, ver))\n",
    "    except ImportError:\n",
    "        print(FAIL, '%s not installed. %s' % (pkg, fail_msg))\n",
    "    return mod\n",
    "\n",
    "\n",
    "# first check the python version\n",
    "print('Using python in', sys.prefix)\n",
    "print(sys.version)\n",
    "pyversion = Version(sys.version)\n",
    "if pyversion >= \"3\":\n",
    "    if pyversion < \"3.4\":\n",
    "        print(FAIL, \"Python version 3.4 (or 2.7) is required,\"\n",
    "                    \" but %s is installed.\" % sys.version)\n",
    "elif pyversion >= \"2\":\n",
    "    if pyversion < \"2.7\":\n",
    "        print(FAIL, \"Python version 2.7 is required,\"\n",
    "                    \" but %s is installed.\" % sys.version)\n",
    "else:\n",
    "    print(FAIL, \"Unknown Python version: %s\" % sys.version)\n",
    "\n",
    "print()\n",
    "requirements = {'numpy': \"1.6.1\", 'scipy': \"0.9\", 'matplotlib': \"1.0\",\n",
    "                'IPython': \"3.0\", 'sklearn': \"0.18\", 'pandas': \"0.18\",\n",
    "                'PIL': \"1.1.7\"}\n",
    "\n",
    "# now the dependencies\n",
    "for lib, required_version in list(requirements.items()):\n",
    "    import_version(lib, required_version)\n",
    "\n",
    "# graphviz is a bit different\n",
    "testgraph = \"\"\"'digraph Tree {\\nnode [shape=box] ;\\n0 [label=\"X[0] <= -3.6693\\\\ngini = 0.6666\\\\nsamples = 100\\\\nvalue = [34, 33, 33]\"] ;\\n1 [label=\"X[0] <= -8.3538\\\\ngini = 0.5\\\\nsamples = 66\\\\nvalue = [0, 33, 33]\"] ;\\n0 -> 1 [labeldistance=2.5, labelangle=45, headlabel=\"True\"] ;\\n2 [label=\"gini = 0.0\\\\nsamples = 33\\\\nvalue = [0, 33, 0]\"] ;\\n1 -> 2 ;\\n3 [label=\"gini = 0.0\\\\nsamples = 33\\\\nvalue = [0, 0, 33]\"] ;\\n1 -> 3 ;\\n4 [label=\"gini = 0.0\\\\nsamples = 34\\\\nvalue = [34, 0, 0]\"] ;\\n0 -> 4 [labeldistance=2.5, labelangle=-45, headlabel=\"False\"] ;\\n}'\"\"\"\n",
    "try:\n",
    "    import graphviz\n",
    "    graphviz.Source(testgraph)\n",
    "except:\n",
    "    print(\"graphviz is not installed.\"\n",
    "          \"It is not required but you will miss out on some plots.\"\n",
    "          \"\\nYou can install it using 'pip install graphviz'.\"\n",
    "          \"You will *also* need to install the graphviz C library, either\"\n",
    "          \" using 'conda install graphviz' or your package manager\")\n"
   ]
  }
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