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How to use _ax_node_from_protocol method in Playwright Python
Best Python code snippet using playwright-python
_accessibility.py
Source:_accessibility.py 
...14from typing import Dict, Optional15from playwright._impl._connection import Channel16from playwright._impl._element_handle import ElementHandle17from playwright._impl._helper import locals_to_params18def _ax_node_from_protocol(axNode: Dict) -> Dict:19 result = {**axNode}20 if "valueNumber" in axNode:21 result["value"] = axNode["valueNumber"]22 elif "valueString" in axNode:23 result["value"] = axNode["valueString"]24 if "checked" in axNode:25 result["checked"] = (26 True27 if axNode.get("checked") == "checked"28 else (29 False if axNode.get("checked") == "unchecked" else axNode.get("checked")30 )31 )32 if "pressed" in axNode:33 result["pressed"] = (34 True35 if axNode.get("pressed") == "pressed"36 else (37 False if axNode.get("pressed") == "released" else axNode.get("pressed")38 )39 )40 if axNode.get("children"):41 result["children"] = list(map(_ax_node_from_protocol, axNode["children"]))42 if "valueNumber" in result:43 del result["valueNumber"]44 if "valueString" in result:45 del result["valueString"]46 return result47class Accessibility:48 def __init__(self, channel: Channel) -> None:49 self._channel = channel50 self._loop = channel._connection._loop51 self._dispatcher_fiber = channel._connection._dispatcher_fiber52 async def snapshot(53 self, interestingOnly: bool = None, root: ElementHandle = None54 ) -> Optional[Dict]:55 params = locals_to_params(locals())56 if root:57 params["root"] = root._channel58 result = await self._channel.send("accessibilitySnapshot", params)...
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It's been suggested by the developers of scrapy_playwright to instantiate the DOWNLOAD_HANDLERS and TWISTER_REACTOR into your script.
A similar comment is provided here
Here's a working script implementing just this:
import scrapy
from scrapy_playwright.page import PageCoroutine
from scrapy.crawler import CrawlerProcess
class ProductSpider(scrapy.Spider):
name = 'product'
def start_requests(self):
yield scrapy.Request(
'https://shoppable-campaign-demo.netlify.app/#/',
callback = self.parse,
meta={
'playwright': True,
'playwright_include_page': True,
'playwright_page_coroutines': [
PageCoroutine("wait_for_selector", "div#productListing"),
]
}
)
async def parse(self, response):
container = response.xpath("(//div[@class='col-md-6'])[1]")
for items in container:
yield {
'products':items.xpath("(//h3[@class='card-title'])[1]//text()").get()
}
# parses content
if __name__ == "__main__":
process = CrawlerProcess(
settings={
"TWISTED_REACTOR": "twisted.internet.asyncioreactor.AsyncioSelectorReactor",
"DOWNLOAD_HANDLERS": {
"https": "scrapy_playwright.handler.ScrapyPlaywrightDownloadHandler",
"http": "scrapy_playwright.handler.ScrapyPlaywrightDownloadHandler",
},
"CONCURRENT_REQUESTS": 32,
"FEED_URI":'Products.jl',
"FEED_FORMAT":'jsonlines',
}
)
process.crawl(ProductSpider)
process.start()
And we get the following output:
{'products': 'Oxford Loafers'}
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