how to enter into li tag with a class name in scarpy code example

Example: scrapy get inside attribute value

#Given 
<time datetime="2020-09-01T11:48:24-03:00" itemprop="datePublished">a given text</time>

# to get the attribute value datetime:
getData = response.css('time::attr(datetime)').get()

# output
'2020-09-01T11:48:24-03:00'