{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Periods"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Decimal fractions\n",
    "\n",
    "From: https://github.com/metomi/isodatetime/issues/147\n",
    "\n",
    ">The smallest value used may also have a decimal fraction, as in \"P0.5Y\" to indicate half a year. This decimal fraction may be specified with either a comma or a full stop, as in \"P0,5Y\" or \"P0.5Y\".\n",
    "\n",
    "https://en.wikipedia.org/wiki/ISO_8601"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "(365.0, 0.0)"
      ]
     },
     "execution_count": 1,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "import metomi.isodatetime.parsers as parse\n",
    "\n",
    "d = parse.DurationParser().parse('P1Y')\n",
    "d.get_days_and_seconds()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "ename": "ISO8601SyntaxError",
     "evalue": "Invalid ISO 8601 duration representation: P0.5Y",
     "output_type": "error",
     "traceback": [
      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[0;31mISO8601SyntaxError\u001b[0m                        Traceback (most recent call last)",
      "\u001b[0;32m~/Development/python/workspace/notebooks/venv/lib/python3.7/site-packages/metomi/isodatetime/parsers.py\u001b[0m in \u001b[0;36mparse\u001b[0;34m(self, expression)\u001b[0m\n\u001b[1;32m    618\u001b[0m                     \u001b[0mallow_truncated\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0;32mFalse\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 619\u001b[0;31m                     \u001b[0massumed_time_zone\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;36m0\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;36m0\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    620\u001b[0m                 )\n",
      "\u001b[0;32m~/Development/python/workspace/notebooks/venv/lib/python3.7/site-packages/metomi/isodatetime/parsers.py\u001b[0m in \u001b[0;36mparse_timepoint_expression\u001b[0;34m(timepoint_expression, validate, **kwargs)\u001b[0m\n\u001b[1;32m    643\u001b[0m     \u001b[0mparser\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mTimePointParser\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m**\u001b[0m\u001b[0mkwargs\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 644\u001b[0;31m     \u001b[0;32mreturn\u001b[0m \u001b[0mparser\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mparse\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mtimepoint_expression\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mvalidate\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0mvalidate\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[0;32m~/Development/python/workspace/notebooks/venv/lib/python3.7/site-packages/metomi/isodatetime/parsers.py\u001b[0m in \u001b[0;36mparse\u001b[0;34m(self, timepoint_string, dump_format, dump_as_parsed, validate)\u001b[0m\n\u001b[1;32m    259\u001b[0m         \"\"\"\n\u001b[0;32m--> 260\u001b[0;31m         \u001b[0mdate_info\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mtime_info\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mparsed_expr\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mget_info\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mtimepoint_string\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    261\u001b[0m         \u001b[0;32mif\u001b[0m \u001b[0mdump_as_parsed\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
      "\u001b[0;32m~/Development/python/workspace/notebooks/venv/lib/python3.7/site-packages/metomi/isodatetime/parsers.py\u001b[0m in \u001b[0;36mget_info\u001b[0;34m(self, timepoint_string)\u001b[0m\n\u001b[1;32m    466\u001b[0m             \u001b[0mdate\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mdate_time_time_zone\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;36m0\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 467\u001b[0;31m             \u001b[0mkeys\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mdate_info\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mget_date_info\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mdate\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    468\u001b[0m             \u001b[0mformat_key\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mtype_key\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mdate_expr\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mkeys\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
      "\u001b[0;32m~/Development/python/workspace/notebooks/venv/lib/python3.7/site-packages/metomi/isodatetime/parsers.py\u001b[0m in \u001b[0;36mget_date_info\u001b[0;34m(self, date_string, bad_types)\u001b[0m\n\u001b[1;32m    426\u001b[0m                                 result.groupdict())\n\u001b[0;32m--> 427\u001b[0;31m         \u001b[0;32mraise\u001b[0m \u001b[0mISO8601SyntaxError\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m\"date\"\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mdate_string\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    428\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n",
      "\u001b[0;31mISO8601SyntaxError\u001b[0m: Invalid ISO 8601 date representation: 0.5Y",
      "\nDuring handling of the above exception, another exception occurred:\n",
      "\u001b[0;31mISO8601SyntaxError\u001b[0m                        Traceback (most recent call last)",
      "\u001b[0;32m<ipython-input-2-32c359c8415e>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0md\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mparse\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mDurationParser\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mparse\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m'P0.5Y'\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m      2\u001b[0m \u001b[0md\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mget_days_and_seconds\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
      "\u001b[0;32m~/Development/python/workspace/notebooks/venv/lib/python3.7/site-packages/metomi/isodatetime/parsers.py\u001b[0m in \u001b[0;36mparse\u001b[0;34m(self, expression)\u001b[0m\n\u001b[1;32m    620\u001b[0m                 )\n\u001b[1;32m    621\u001b[0m             \u001b[0;32mexcept\u001b[0m \u001b[0mISO8601SyntaxError\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 622\u001b[0;31m                 \u001b[0;32mraise\u001b[0m \u001b[0mISO8601SyntaxError\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m\"duration\"\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mexpression\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    623\u001b[0m             \u001b[0;32mif\u001b[0m \u001b[0mtimepoint\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mget_is_week_date\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    624\u001b[0m                 \u001b[0;32mraise\u001b[0m \u001b[0mISO8601SyntaxError\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m\"duration\"\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mexpression\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
      "\u001b[0;31mISO8601SyntaxError\u001b[0m: Invalid ISO 8601 duration representation: P0.5Y"
     ]
    }
   ],
   "source": [
    "d = parse.DurationParser().parse('P0.5Y')\n",
    "d.get_days_and_seconds()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Other libraries"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "#### iso8601"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "ename": "ParseError",
     "evalue": "Unable to parse date string 'P1Y'",
     "output_type": "error",
     "traceback": [
      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[0;31mParseError\u001b[0m                                Traceback (most recent call last)",
      "\u001b[0;32m<ipython-input-3-38e514b82c7e>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[1;32m      1\u001b[0m \u001b[0;32mimport\u001b[0m \u001b[0miso8601\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m      2\u001b[0m \u001b[0;31m# iso8601 does not seem to support periods\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 3\u001b[0;31m \u001b[0miso8601\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mparse_date\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m\"P1Y\"\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[0;32m~/Development/python/workspace/notebooks/venv/lib/python3.7/site-packages/iso8601/iso8601.py\u001b[0m in \u001b[0;36mparse_date\u001b[0;34m(datestring, default_timezone)\u001b[0m\n\u001b[1;32m    193\u001b[0m     \u001b[0mm\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mISO8601_REGEX\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mmatch\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mdatestring\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    194\u001b[0m     \u001b[0;32mif\u001b[0m \u001b[0;32mnot\u001b[0m \u001b[0mm\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 195\u001b[0;31m         \u001b[0;32mraise\u001b[0m \u001b[0mParseError\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m\"Unable to parse date string %r\"\u001b[0m \u001b[0;34m%\u001b[0m \u001b[0mdatestring\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    196\u001b[0m     \u001b[0mgroups\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mm\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mgroupdict\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    197\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n",
      "\u001b[0;31mParseError\u001b[0m: Unable to parse date string 'P1Y'"
     ]
    }
   ],
   "source": [
    "import iso8601\n",
    "# iso8601 does not seem to support periods\n",
    "iso8601.parse_date(\"P1Y\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "#### Pendulum"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "Duration(years=1, days=0)"
      ]
     },
     "execution_count": 4,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "import pendulum\n",
    "pendulum.parse(\"P1Y\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "ename": "ParserError",
     "evalue": "Unable to parse string [P0.5Y]",
     "output_type": "error",
     "traceback": [
      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[0;31mParserError\u001b[0m                               Traceback (most recent call last)",
      "\u001b[0;32m<ipython-input-5-39eff8703077>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0mpendulum\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mparse\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m\"P0.5Y\"\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[0;32m~/Development/python/workspace/notebooks/venv/lib/python3.7/site-packages/pendulum/parser.py\u001b[0m in \u001b[0;36mparse\u001b[0;34m(text, **options)\u001b[0m\n\u001b[1;32m     18\u001b[0m     \u001b[0moptions\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;34m\"now\"\u001b[0m\u001b[0;34m]\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0moptions\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mget\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m\"now\"\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mpendulum\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mget_test_now\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m     19\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m---> 20\u001b[0;31m     \u001b[0;32mreturn\u001b[0m \u001b[0m_parse\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mtext\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m**\u001b[0m\u001b[0moptions\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m     21\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m     22\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n",
      "\u001b[0;32m~/Development/python/workspace/notebooks/venv/lib/python3.7/site-packages/pendulum/parser.py\u001b[0m in \u001b[0;36m_parse\u001b[0;34m(text, **options)\u001b[0m\n\u001b[1;32m     34\u001b[0m         \u001b[0;32mreturn\u001b[0m \u001b[0mpendulum\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mnow\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m     35\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m---> 36\u001b[0;31m     \u001b[0mparsed\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mbase_parse\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mtext\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m**\u001b[0m\u001b[0moptions\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m     37\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m     38\u001b[0m     \u001b[0;32mif\u001b[0m \u001b[0misinstance\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mparsed\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mdatetime\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mdatetime\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
      "\u001b[0;32m~/Development/python/workspace/notebooks/venv/lib/python3.7/site-packages/pendulum/parsing/__init__.py\u001b[0m in \u001b[0;36mparse\u001b[0;34m(text, **options)\u001b[0m\n\u001b[1;32m     68\u001b[0m     \u001b[0m_options\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mupdate\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0moptions\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m     69\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m---> 70\u001b[0;31m     \u001b[0;32mreturn\u001b[0m \u001b[0m_normalize\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0m_parse\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mtext\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m**\u001b[0m\u001b[0m_options\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m**\u001b[0m\u001b[0m_options\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m     71\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m     72\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n",
      "\u001b[0;32m~/Development/python/workspace/notebooks/venv/lib/python3.7/site-packages/pendulum/parsing/__init__.py\u001b[0m in \u001b[0;36m_parse\u001b[0;34m(text, **options)\u001b[0m\n\u001b[1;32m    122\u001b[0m     \u001b[0;31m# If not strict\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    123\u001b[0m     \u001b[0;32mif\u001b[0m \u001b[0moptions\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mget\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m\"strict\"\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;32mTrue\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 124\u001b[0;31m         \u001b[0;32mraise\u001b[0m \u001b[0mParserError\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m\"Unable to parse string [{}]\"\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mformat\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mtext\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    125\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    126\u001b[0m     \u001b[0;32mtry\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
      "\u001b[0;31mParserError\u001b[0m: Unable to parse string [P0.5Y]"
     ]
    }
   ],
   "source": [
    "pendulum.parse(\"P0.5Y\")"
   ]
  }
 ],
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