Scrapy CSV export reside in 1 cell - python-2.7

Question

I want to write to a csv with each data observation stored in one line. However, I have all observations reside in one cell. I tried with yield item to replace item.append(item) and return items, but it didn't work either.
import scrapy
from selenium import webdriver
import time
from scrapy.selector import Selector
from scrapy.selector import HtmlXPathSelector
from gdp.items import gdpItem
import unicodecsv as csv
class gdp_spider2(scrapy.Spider):
name = 'gdp_spider2'
allowed_domains = ['statdb.dgbas.gov.tw/']
start_urls = ['http://statdb.dgbas.gov.tw/pxweb/Dialog/varval.asp?ma=NA8101A1Q&ti=Principal%20Figures%282008SNA%29-Quarterly&path=../PXfileE/NationalIncome/&lang=1&strList=L']
def __init__(self):
self.driver = webdriver.Firefox()
def parse(self, response):
items = []
driver = self.driver
driver.get(response.url)
driver.find_element_by_partial_link_text('Select all').click()
driver.find_element_by_xpath('//option[contains(text(),"GDP (Million N.T.$,at Current Prices)")]').click()
driver.find_element_by_xpath('//option[contains(text(),"Data")]').click()
driver.find_element_by_xpath('//input[#type="SUBMIT"]').click()
hxs = HtmlXPathSelector(text=self.driver.page_source)
data = hxs.xpath("//table[#class='pxtable']//tbody//tr")
for datum in data:
item = gdpItem()
item ["date"] = datum.xpath('//td[1]/text()').extract()
item ["data"] = datum.xpath('//td[2]/text()').extract()
items.append(item)
return items
CSV image

Answer 1

Try this:
def parse(self, response):
items = []
item = gdpItem()
driver = self.driver
driver.get(response.url)
driver.find_element_by_partial_link_text('Select all').click()
driver.find_element_by_xpath('//option[contains(text(),"GDP (Million N.T.$,at Current Prices)")]').click()
driver.find_element_by_xpath('//option[contains(text(),"Data")]').click()
driver.find_element_by_xpath('//input[#type="SUBMIT"]').click()
hxs = HtmlXPathSelector(text=self.driver.page_source)
data = hxs.xpath("//table[#class='pxtable']//tbody//tr")
for datum in data:
item ["date"] = datum.xpath('td[1]/text()').extract()
item ["data"] = datum.xpath('td[2]/text()').extract()
yield item