{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [],
   "source": [
    "import jinja2"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# variables"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "your variable value: 100gle\n",
      "\n",
      "inner set variable value: author\n"
     ]
    }
   ],
   "source": [
    "tpl = \"\"\"\\\n",
    "your variable value: {{ name }}\n",
    "{% set badge=\"author\" %}\n",
    "inner set variable value: {{ badge }}\n",
    "\"\"\"\n",
    "\n",
    "template = jinja2.Template(tpl)\n",
    "s = template.render(name=\"100gle\")\n",
    "print(s)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# comment"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 50,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'Hello, world\\n'"
      ]
     },
     "execution_count": 50,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "tpl = \"\"\"\\\n",
    "Hello, world\n",
    "{# this line wouldn't be rendered. #}\n",
    "\"\"\"\n",
    "\n",
    "template = jinja2.Template(tpl)\n",
    "template.render()\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# for loop"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "    * Reading\n",
      "    * Home Work\n",
      "    * Exercise\n",
      "\n"
     ]
    }
   ],
   "source": [
    "tpl = \"\"\"\\\n",
    "{# use for-loop in jinja2 #}\n",
    "{% for todo in todolist  %}\n",
    "    * {{ todo }}\n",
    "{% endfor %}\n",
    "\"\"\"\n",
    "\n",
    "todolist = [\"Reading\", \"Home Work\", \"Exercise\"]\n",
    "template = jinja2.Template(tpl, trim_blocks=True)\n",
    "s = template.render(todolist=todolist)\n",
    "print(s)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "        name: Reading\n",
      "        priority: 2\n",
      "        name: Home Work\n",
      "        priority: 0\n",
      "        name: Exercise\n",
      "        priority: 1\n",
      "\n"
     ]
    }
   ],
   "source": [
    "tpl = \"\"\"\\\n",
    "{# use for-loop in jinja2 #}\n",
    "{% for todo in todolist  %}\n",
    "    {% for key, value in todo.items()  %}\n",
    "        {{ key }}: {{ value }}\n",
    "    {% endfor %}\n",
    "{% endfor %}\n",
    "\"\"\"\n",
    "\n",
    "todolist = [\n",
    "    dict(name=\"Reading\", priority=2),\n",
    "    dict(name=\"Home Work\", priority=0),\n",
    "    dict(name=\"Exercise\", priority=1),\n",
    "]\n",
    "template = jinja2.Template(tpl, trim_blocks=True, lstrip_blocks=True)\n",
    "s = template.render(todolist=todolist)\n",
    "print(s)\n",
    "\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# if-else"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 52,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "        Reading**\n",
      "        Home Work\n",
      "        Exercise*\n",
      "\n"
     ]
    }
   ],
   "source": [
    "tpl = \"\"\"\\\n",
    "{% for todo in todolist %}\n",
    "    {% if todo.priority == 2 %}\n",
    "        {{ todo.name }}**\n",
    "    {% elif todo.priority == 1 %}\n",
    "        {{ todo.name }}*\n",
    "    {% else %}\n",
    "        {{ todo.name }}\n",
    "    {% endif %}\n",
    "{% endfor %}\n",
    "\"\"\"\n",
    "\n",
    "todolist = [\n",
    "    dict(name=\"Reading\", priority=2),\n",
    "    dict(name=\"Home Work\", priority=0),\n",
    "    dict(name=\"Exercise\", priority=1),\n",
    "]\n",
    "\n",
    "template = jinja2.Template(tpl, lstrip_blocks=True, trim_blocks=True)\n",
    "s = template.render(todolist=todolist)\n",
    "print(s)\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# macros"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "\n",
      "        Reading**\n",
      "        Home Work\n",
      "        Exercise*\n",
      "\n"
     ]
    }
   ],
   "source": [
    "tpl = \"\"\"\\\n",
    "{% macro show_todo(name, priority) -%}\n",
    "    {% set marker=\"\" %}\n",
    "    {% if priority == 2 %}\n",
    "        {% set marker = \"**\" %}\n",
    "    {% elif priority == 1 %}\n",
    "        {% set marker = \"*\" %}\n",
    "    {% endif %}\n",
    "    {{ name }}{{ marker }}\n",
    "{%- endmacro %}\n",
    "\n",
    "{% for todo in todolist %}\n",
    "    {{ show_todo(todo.name, todo.priority) }}\n",
    "{% endfor %}\n",
    "\"\"\"\n",
    "\n",
    "todolist = [\n",
    "    dict(name=\"Reading\", priority=2),\n",
    "    dict(name=\"Home Work\", priority=0),\n",
    "    dict(name=\"Exercise\", priority=1),\n",
    "]\n",
    "\n",
    "template = jinja2.Template(tpl, trim_blocks=True, lstrip_blocks=True)\n",
    "s = template.render(todolist=todolist)\n",
    "print(s)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# filter"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "    - before: $10.99, after: 10.99\n",
      "    - before: €0.99, after: 0.99\n",
      "    - before: ¥100, after: 100\n",
      "\n"
     ]
    }
   ],
   "source": [
    "def remove_currerncy(val: str):\n",
    "    currencies = set(\"$€¥\")\n",
    "    if val[0] in currencies:\n",
    "        return val[1:]\n",
    "    return val\n",
    "\n",
    "tpl = \"\"\"\\\n",
    "{% for value in money %}\n",
    "    - before: {{ value }}, after: {{ value|remove_currency}}\n",
    "{% endfor %}\n",
    "\"\"\"\n",
    "\n",
    "money = [\"$10.99\", \"€0.99\", \"¥100\"]\n",
    "\n",
    "\n",
    "env = jinja2.Environment(trim_blocks=True)\n",
    "env.filters[\"remove_currency\"] = remove_currerncy\n",
    "\n",
    "template = env.from_string(tpl)\n",
    "s = template.render(money=money)\n",
    "print(s)\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# inheritance"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "# bug: TemplateNotFound error should be fixed.\n",
      "\n",
      "Your environment:\n",
      "\n",
      "            - python version: 3.9\n",
      "            - jinja2: 3.2.x\n",
      "    \n",
      "---\n",
      "\n",
      "Bug detail:\n",
      "\n",
      "More description here:\n",
      "\n",
      "    ```python\n",
      "    ...\n",
      "    ```\n",
      "\n"
     ]
    }
   ],
   "source": [
    "env = jinja2.Environment(\n",
    "    trim_blocks=True,\n",
    "    loader=jinja2.FileSystemLoader(\"./templates/inheritance/\"),\n",
    ")\n",
    "\n",
    "template = env.get_template(\"bug_report.md\")\n",
    "s = template.render(\n",
    "    title=\"bug: TemplateNotFound error should be fixed.\",\n",
    "    setup=[\n",
    "        dict(name=\"python version\", detail=3.9),\n",
    "        dict(name=\"jinja2\", detail=\"3.2.x\"),\n",
    "    ],\n",
    "    description=\"\"\"\\\n",
    "More description here:\n",
    "\n",
    "    ```python\n",
    "    ...\n",
    "    ```\n",
    "    \"\"\".strip()\n",
    ")\n",
    "print(s)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
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