How to remove a certain part of a string in scrapy for python -

i'm trying clean output because when scrape website gives, reviewed 7/20/2015 trying strip shows 7/20/2015. i've been trying , when test making mock dict , populate values code works not in scrapy. assume field() dict = {value:[],value2:[]} dont know why not work on field()

here's code snippet

for j in range(len(item['date'])):     item['date'][j][9:].strip() 

i use built-in re() method of selector:

response.xpath("//div[@id='test']/text()").re(r"\d{1,2}/\d{1,2}/\d{4}")