worldometers.py

import scrapy


class WorldometersSpider(scrapy.Spider):
    name = 'worldometers'
    allowed_domains = ['www.worldometers.info']
    start_urls = ['https://www.worldometers.info/world-population/population-by-country/']

    def parse(self, response):
        # Getting all the rows of the table
        rows = response.xpath('//tr')

        for row in rows:
            # Extracting country names and population