{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "import sys\n",
    "import logging"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [],
   "source": [
    "default = '\\033[0m'\n",
    "red = '\\033[31m'\n",
    "yellow = '\\033[33m'\n",
    "blue = '\\033[34m'\n",
    "gray = '\\033[37m'"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [],
   "source": [
    "fmt = gray + '[{asctime}] %s{levelname}: {message}' + default\n",
    "time_fmt = '%H:%M:%S'\n",
    "\n",
    "error_formatter = logging.Formatter(fmt%(red), style='{')\n",
    "error_formatter.default_time_format = time_fmt\n",
    "\n",
    "warning_formatter = logging.Formatter(fmt%(yellow), style='{')\n",
    "warning_formatter.default_time_format = time_fmt\n",
    "\n",
    "info_formatter = logging.Formatter(fmt%(blue), style='{')\n",
    "info_formatter.default_time_format = time_fmt\n",
    "\n",
    "debug_formatter = logging.Formatter(fmt%(gray), style='{')\n",
    "debug_formatter.default_time_format = time_fmt"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [],
   "source": [
    "class error_filter(logging.Filter):\n",
    "    def filter(self, record):\n",
    "        return logging.ERROR <= record.levelno\n",
    "    \n",
    "class warning_filter(logging.Filter):\n",
    "    def filter(self, record):\n",
    "        return logging.WARNING <= record.levelno < logging.ERROR\n",
    "\n",
    "class info_filter(logging.Filter):\n",
    "    def filter(self, record):\n",
    "        return logging.INFO <= record.levelno < logging.WARNING\n",
    "\n",
    "class debug_filter(logging.Filter):\n",
    "    def filter(self, record):\n",
    "        return logging.DEBUG <= record.levelno < logging.INFO"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [],
   "source": [
    "logger = logging.getLogger(__name__)\n",
    "\n",
    "error_handler = logging.StreamHandler(sys.stdout)\n",
    "error_handler.setFormatter(error_formatter)\n",
    "error_handler.addFilter(error_filter())\n",
    "error_handler.setLevel(logging.ERROR)\n",
    "\n",
    "warning_handler = logging.StreamHandler(sys.stdout)\n",
    "warning_handler.setFormatter(warning_formatter)\n",
    "warning_handler.addFilter(warning_filter())\n",
    "warning_handler.setLevel(logging.WARNING)\n",
    "\n",
    "info_handler = logging.StreamHandler(sys.stdout)\n",
    "info_handler.setFormatter(info_formatter)\n",
    "info_handler.addFilter(info_filter())\n",
    "info_handler.setLevel(logging.INFO)\n",
    "\n",
    "debug_handler = logging.StreamHandler(sys.stdout)\n",
    "debug_handler.setFormatter(debug_formatter)\n",
    "debug_handler.addFilter(debug_filter())\n",
    "debug_handler.setLevel(logging.DEBUG)\n",
    "\n",
    "logger.addHandler(error_handler)\n",
    "logger.addHandler(warning_handler)\n",
    "logger.addHandler(info_handler)\n",
    "logger.addHandler(debug_handler)\n",
    "logger.setLevel(logging.DEBUG)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "\u001b[37m[23:08:50,567] \u001b[37mDEBUG: this is a debug message\u001b[0m\n",
      "\u001b[37m[23:08:50,568] \u001b[34mINFO: this is an info message\u001b[0m\n",
      "\u001b[37m[23:08:50,569] \u001b[33mWARNING: this is a warning message\u001b[0m\n",
      "\u001b[37m[23:08:50,570] \u001b[31mERROR: this is an error message\u001b[0m\n"
     ]
    }
   ],
   "source": [
    "logger.debug('this is a debug message')\n",
    "logger.info('this is an info message')\n",
    "logger.warning('this is a warning message')\n",
    "logger.error('this is an error message')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 3",
   "language": "python",
   "name": "python3"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
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