Spider.parse callback is not defined
在scrapy中,用FormRequest写post请求登陆人人网的时候,报错Spider.parse callback is not defined
代码是这样的
# -*- coding: utf-8 -*-
import scrapy
# from scrapy.spiders import CrawlSpider
class RenrenSpider(scrapy.Spider):
# class RenrenSpider(CrawlSpider):
name = 'renren'
allowed_domains = ['renren.com']
start_urls = ['http://renren.com/']
# def parse(self, response):
# pass
def start_request(self):
url = 'http://www.renren.com/PLogin.do'
data = {
'email':'youremail', 'password':'yourpassword'}
request = scrapy.FormRequest(url, formdata=data, callback=self.parse_page)
yield request
def parse_page(self, response):
with open('renren.html', 'w', encoding='utf-8') as fp:
fp.write(response.text)
查找相关贴子,说要继承CrawlSpider类,修改后还是不行。
试着将回调函数的名字改为parse,结果成功了。
# -*- coding: utf-8 -*-
import scrapy
# from scrapy.spiders import CrawlSpider
class RenrenSpider(scrapy.Spider):
# class RenrenSpider(CrawlSpider):
name = 'renren'
allowed_domains = ['renren.com']
start_urls = ['http://renren.com/']
# def parse(self, response):
# pass
def start_request(self):
url = 'http://www.renren.com/PLogin.do'
data = {
'email':'[email protected]', 'password':'pythonspider'}
request = scrapy.FormRequest(url, formdata=data, callback=self.parse)
yield request
def parse(self, response):
with open('renren.html', 'w', encoding='utf-8') as fp:
fp.write(response.text)