ERROR: Spider error processing <GET

[rammurti84]

2018-03-02 22:15:34 [scrapy.core.scraper] ERROR: Spider error processing <GET https://www.safaribooksonline.com/api/v1/book/9781449342562/chapter-content/ch01.html> (referer: https://www.safaribooksonline.com//api/v1/book/9781449342562/chapter/ch01.html)
Traceback (most recent call last):
File "c:\python27\lib\site-packages\scrapy\utils\defer.py", line 102, in iter_errback
yield next(it)
File "c:\python27\lib\site-packages\scrapy\spidermiddlewares\offsite.py", line 30, in process_spider_output
for x in result:
File "c:\python27\lib\site-packages\scrapy\spidermiddlewares\referer.py", line 339, in
return (_set_referer(r) for r in result or ())
File "c:\python27\lib\site-packages\scrapy\spidermiddlewares\urllength.py", line 37, in
return (r for r in result or () if _filter(r))
File "c:\python27\lib\site-packages\scrapy\spidermiddlewares\depth.py", line 58, in
return (r for r in result or () if _filter(r))
File "c:\python27\lib\site-packages\safaribooks\spiders\safaribooks.py", line 179, in parse_page
fh.write(template.render(body=body, style=style))
File "c:\python27\lib\site-packages\jinja2\environment.py", line 1008, in render
return self.environment.handle_exception(exc_info, True)
File "c:\python27\lib\site-packages\jinja2\environment.py", line 780, in handle_exception
reraise(exc_type, exc_value, tb)
File "", line 9, in top-level template code

[andrewvn2010]

I fixed this by removing the last / in url variable in safaribooks.py