本文整理汇总了Python中scrapy.http.request.Request.headers["User-Agent"]方法的典型用法代码示例。如果您正苦于以下问题：Python Request.headers["User-Agent"]方法的具体用法？Python Request.headers["User-Agent"]怎么用？Python Request.headers["User-Agent"]使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类scrapy.http.request.Request的用法示例。
在下文中一共展示了Request.headers["User-Agent"]方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: parse
# 需要导入模块: from scrapy.http.request import Request [as 别名]
# 或者: from scrapy.http.request.Request import headers["User-Agent"] [as 别名]
def parse(self, response):
#obtains links from page to page and passes links to parse_playerURL
sel = Selector(response) #define selector based on response object (points to urls in start_urls by default)
url_list = sel.xpath('//tbody/tr/td[@class="player"]/a/@href') #obtain a list of href links that contain relative links of players
for i in url_list:
relative_url = self.clean_str(i.extract()) #i is a selector and hence need to extract it to obtain unicode object
print urljoin(response.url, relative_url) #urljoin is able to merge absolute and relative paths to form 1 coherent link
req = Request(urljoin(response.url, relative_url),callback=self.parse_playerURL) #pass on request with new urls to parse_playerURL
req.headers["User-Agent"] = self.random_ua()
yield req
next_url=sel.xpath('//div[@class="right-nav pull-right"]/a[@rel="next"]/@href').extract_first()
if(next_url): #checks if next page exists
clean_next_url = self.clean_str(next_url)
reqNext = Request(urljoin(response.url, clean_next_url),callback=self.parse) #calls back this function to repeat process on new list of links
yield reqNext