web scraping - Unordered .csv fields in scrapy -

i developing spider several fields scrapy framework. when export scrapped fields .csv file, fields (or columns) unordered, not defined them in items.py file.

does know how solve issue?

thanks in advance.

class myspider(basespider):     filehandle1 = open('file.xls','w')     ---------------     def parse(self, response):             -----------             self.filehandle2.write("%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\n"%(item['a'],item['h'],item['g'],item['f'],item['e'],item['d'],item['c'],item['b']))