今天写爬虫,遇到一个坑,提示[scrapy.core.scraper] ERROR: Spider must return request, item, or None, got 'Tag' in <GET https://www. 其实原因很意外,我在代码中使用了item,同时scrapy又用item传递数据,结果造成了这样的问题 foriteminsoup.select(".job-list-item"): uu=item.select_one("a").get...
{{ item.name }}{{ index }} {{ item.version }}{{ index }} </template> export default { name: 'HomeView', data() { return { list: [ { name: 'vue', version: '2' }, { name: 'react', version: '17' } ] }; } }; 1. 2. 3. 4. 5. 6. 7. 8. 9. 10....
Add strings to list and expiry each item in certain period of time add text file data into arraylist Add Text to a Textbox without removing previous text Add Two Large Numbers Using Strings - Without Use of BigInt Add user properties settings at run time... Add Username and Password Json...
function getData($item = 1) { if ($item > 3) { return false; } $res = file_get_contents('xxxx'); if ($res['code'] == 200) { return $res; } else { returngetData(++$item);//这个return很重要 } }
When you use a relative cell reference in a formula, it adjusts based on the position of the formula in relation to the referenced cell. For example, if you have a formula in cell B2 that references cell A1, and you copy the formula to cell B3, the reference will automatically change ...
Add dropdown list and allow adding new values add HTTPS and the web page is blank Add logo to bootstrap sidebar Add new attribute on SelectListItem Add new item in list at view and return to controller in MVC Add question mark to tooltip Add text to validation field with jquery Add Vi...
import scrapy from ..items import ScrapyDemoItem class ExampleSpider(scrapy.Spider): name = 'my_spider' allowed_domains = ['http://www.itcast.cn/channel/teacher.shtml'] start_urls = ['http://www.itcast.cn/channel/teacher.shtml'] def parse(self, response): # extract()可以提取data里的文...
GoToPreviousInList GoToPreviousModified GotoPreviousUncovered GoToProperty GoToRecordedTestSession GoToReference GoToRow GoToSourceCode GoToTop GoToTypeDefinition GoToWebTest GoToWorkItem GraphBottomToTop GraphLeftToRight GraphRightToLeft GraphTopToBottom GreenChannel Сетка GridApplication GridDark GridDetailV...
How do i run this Rest Json API in sql server directly ? I believe its a combination of using he below, but i could not figure out the last syntax. sp_OACreate, sp_OAMethod sp_OAGetProperty Python version is here : # Version 3.6.1importrequestsresponse=requests....
import multiprocessing def process_data(data_chunk): return [x * 2 for x in data_chunk] def data_generator(): for i in range(1000000): yield i # Yields one item at a time (not a list) def worker(input_queue, output_queue): while True: data_chunk = input_queue.get() if data_...