notebook/5-2-scrapy.ipynb

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    "# Scrapy tutorial\n",
    "\n",
    "**[Scrapy](https://scrapy.org/) is a very good web scrape project. If you have a large project, this one may help you a lot.**\n",
    "\n",
    "**We demonstrate it by an example showed last time, to scrape [my website](https://mofanpy.com/').This is a simple demo, if you want to dig into it, here is the [official tutorials](https://docs.scrapy.org/en/latest/intro/overview.html).**"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 43,
   "metadata": {},
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   "source": [
    "import scrapy\n",
    "\n",
    "\n",
    "class MofanSpider(scrapy.Spider):\n",
    "    name = \"mofan\"\n",
    "    start_urls = [\n",
    "        'https://mofanpy.com/',\n",
    "    ]\n",
    "    # unseen = set()\n",
    "    # seen = set()      # we don't need these two as scrapy will deal with them automatically\n",
    "\n",
    "    def parse(self, response):\n",
    "        yield {     # return some results\n",
    "            'title': response.css('h1::text').extract_first(default='Missing').strip().replace('\"', \"\"),\n",
    "            'url': response.url,\n",
    "        }\n",
    "\n",
    "        urls = response.css('a::attr(href)').re(r'^/.+?/$')     # find all sub urls\n",
    "        for url in urls:\n",
    "            yield response.follow(url, callback=self.parse)     # it will filter duplication automatically\n",
    "\n",
    "\n",
    "# lastly, run this in terminal\n",
    "# scrapy runspider 5-2-scrapy.py -o res.json"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "**Run this code from terminal or cmd, you will see all the log for scraping.**"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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