TypeError: getattr(): attribute name must be string

[sandeepsingh]

Hi i am finding this issue while running aduana example. Please help how to to resolve this issue.

scray crawl example

Unhandled error in Deferred:
2017-05-08 12:22:20 [twisted] CRITICAL: Unhandled error in Deferred:

Traceback (most recent call last):
File "/home/sandeep.singh/anaconda2/lib/python2.7/site-packages/scrapy/commands/crawl.py", line 57, in run
self.crawler_process.crawl(spname, **opts.spargs)
File "/home/sandeep.singh/anaconda2/lib/python2.7/site-packages/scrapy/crawler.py", line 163, in crawl
return self._crawl(crawler, *args, **kwargs)
File "/home/sandeep.singh/anaconda2/lib/python2.7/site-packages/scrapy/crawler.py", line 167, in _crawl
d = crawler.crawl(*args, **kwargs)
File "/home/sandeep.singh/anaconda2/lib/python2.7/site-packages/twisted/internet/defer.py", line 1331, in unwindGenerator
return _inlineCallbacks(None, gen, Deferred())
--- ---
File "/home/sandeep.singh/anaconda2/lib/python2.7/site-packages/twisted/internet/defer.py", line 1185, in _inlineCallbacks
result = g.send(result)
File "/home/sandeep.singh/anaconda2/lib/python2.7/site-packages/scrapy/crawler.py", line 90, in crawl
six.reraise(*exc_info)
File "/home/sandeep.singh/anaconda2/lib/python2.7/site-packages/scrapy/crawler.py", line 74, in crawl
yield self.engine.open_spider(self.spider, start_requests)
exceptions.TypeError: getattr(): attribute name must be string
2017-05-08 12:22:20 [twisted] CRITICAL:
Traceback (most recent call last):
File "/home/sandeep.singh/anaconda2/lib/python2.7/site-packages/twisted/internet/defer.py", line 1185, in _inlineCallbacks
result = g.send(result)
File "/home/sandeep.singh/anaconda2/lib/python2.7/site-packages/scrapy/crawler.py", line 90, in crawl
six.reraise(*exc_info)
File "/home/sandeep.singh/anaconda2/lib/python2.7/site-packages/scrapy/crawler.py", line 74, in crawl
yield self.engine.open_spider(self.spider, start_requests)
TypeError: getattr(): attribute name must be string