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    "# Copyright 2014 Brett Slatkin, Pearson Education Inc.\n",
    "#\n",
    "# Licensed under the Apache License, Version 2.0 (the \"License\");\n",
    "# you may not use this file except in compliance with the License.\n",
    "# You may obtain a copy of the License at\n",
    "#\n",
    "#     http://www.apache.org/licenses/LICENSE-2.0\n",
    "#\n",
    "# Unless required by applicable law or agreed to in writing, software\n",
    "# distributed under the License is distributed on an \"AS IS\" BASIS,\n",
    "# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n",
    "# See the License for the specific language governing permissions and\n",
    "# limitations under the License.\n",
    "\n",
    "# Preamble to mimick book environment\n",
    "import logging\n",
    "from pprint import pprint\n",
    "from sys import stdout as STDOUT\n",
    "\n",
    "\n",
    "# Example 4\n",
    "# db_connection.py\n",
    "import sys\n",
    "\n",
    "class Win32Database(object):\n",
    "    pass\n",
    "\n",
    "class PosixDatabase(object):\n",
    "    pass\n",
    "\n",
    "if sys.platform.startswith('win32'):\n",
    "    Database = Win32Database\n",
    "else:\n",
    "    Database = PosixDatabase\n"
   ]
  }
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