I use .extract() to get the data from a xpath, like:
response.xpath('//*@id="bakery"]/span[2]/text()').extract()
the issue with this is that I always get a list as response. for example:
['23']
I only want the number, so I try with:
response.xpath('//*@id="bakery"]/span[2]/text()').extract()[0]
but this is a problem is the list empty, although I can use an exception to handle that scenario I guess there is a better way to do it
解决方法
.extract_first() to the rescue:
response.xpath('//*@id="bakery"]/span[2]/text()').extract_first()
Instead of an exception, it would return None if no elements were matched.
