纠结scrapy版本的说明，直接运行报错如下

• 报错1

from scrapy.selector import HtmlXPathSelector
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: cannot import name 'HtmlXPathSelector'

scrapy 1.7.0以后就删除了HtmlXPathSelector，我就装了1.6.0版本。
但是运行的时候，还是报错如下

• 报错2

File "/mnt/d/www/Movie-scrapy/movie/movie/spiders/mtime_spider.py", line 2, in <module>
    from scr

See https://pypi.org/project/pip-date/ - it is too short, would be nice to have some basic introduction there, like in README, and a couple screenshots.