Scrapy 在 xpath 查询时返回 None

Question

Hi so i am using srapy to scrape a website https://www.centralbankofindia.co.in and I am getting a response but on finding address by XPath I am getting None

    start_urls = [
    "https://www.centralbankofindia.co.in/en/branch-locator?field_state_target_id=All&combine=&page={}".format(
        i
    )
    for i in range(0, 5)
]
brand_name = "Central Bank of India"
spider_type = "chain"
# //*[@id="block-cbi-content"]/div/div/div/div[3]/div/table/tbody/tr[1]/td[2]/div/span[2]
# //*[@id="block-cbi-content"]/div/div/div/div[3]/div/table/tbody/tr[2]/td[2]/div/span[2]
# //*[@id="block-cbi-content"]/div/div/div/div[3]/div/table/tbody/tr[3]/td[2]/div/span[2]
def parse(self, response, **kwargs):
    """Parse response."""
    # print(response.text)
    for id in range(1, 11):
        address = self.get_text(
            response,
            f'//*[@id="block-cbi-content"]/div/div/div/div[3]/div/table/tbody/tr[{id}]/td[2]/div/span[2]',
        )
        print(address)

    def get_text(self, response, path):
    sol = response.xpath(path).extract_first()
    return sol

The span class for address in the website doesn't have a unique id, is that what is causing the problem?

Answer 1

I think you created too complex xpath . You should skip some elements and use // instead.

Some browsers may show tbody in DevTools but it may not exists in HTML which scrapy gets from server so better always skip it.

And you could use extract() instead of tr[{id}] and extract_first()

This xpath works for me.

all_items = response.xpath('//*[@id="block-cbi-content"]//td[2]//span[2]/text()').extract()
        
for address in all_items:
    print(address)

BTW: I used text() in xpath to get address without HTML tags.

---

Full working code.

You can put all in one file and run it as python script.py without creating project .

It saves results in output.csv .

In start_urls I set only link to first page because parse() searchs link to next page in HTML - so it can get all pages instead of range(0, 5)

#!/usr/bin/env python3

import scrapy

class MySpider(scrapy.Spider):
    
    start_urls = [
        # f"https://www.centralbankofindia.co.in/en/branch-locator?field_state_target_id=All&combine=&page={i}"
        # for i in range(0, 5)
        
        # only first page - links to other pages it will find in HTML
        "https://www.centralbankofindia.co.in/en/branch-locator?field_state_target_id=All&combine=&page=0"
    ]
    
    name = "Central Bank of India"
    
    def parse(self, response):
        print(f'url: {response.url}')
        
        all_items = response.xpath('//*[@id="block-cbi-content"]//td[2]//span[2]/text()').extract()
        
        for address in all_items:
            print(address)
            yield {'address': address}

        # get link to next page
        
        next_page = response.xpath('//a[@rel="next"]/@href').extract_first()
        
        if next_page:
            print(f'Next Page: {next_page}')
            yield response.follow(next_page)
            
# --- run without project and save in `output.csv` ---

from scrapy.crawler import CrawlerProcess

c = CrawlerProcess({
    'USER_AGENT': 'Mozilla/5.0',
    # save in file CSV, JSON or XML
    'FEEDS': {'output.csv': {'format': 'csv'}},  # new in 2.1
})
c.crawl(MySpider)
c.start()