python - Numbering Items in Scrapy -


so have items.py following:

class scrapyitem(scrapy.item):     source = scrapy.field()     link = scrapy.field()

and json output is:

[{"source": "some source", "link":"www.somelink.com"},  {"source": "some source again", "link":"www.somelink.org"}]

is there way change output to:

[{"source1": "some source", "link1":"www.somelink.com"},  {"source2": "some source again", "link2":"www.somelink.org"}]

from docs, saw can manipulate item values, can same items themselves?

edit

here's new code i'm using output article_id item_field

article_id = [1] def parse_common(self, response):     feed = feedparser.parse(response.body)     entry_n, entry in enumerate(feed.entries, start=article_id[-1]):         try:             item = newsbyteitem()             item['source'] = response.url             item['title'] = lxml.html.fromstring(entry.title).text             item['link'] = entry.link             item['description'] = entry.description             item['article_id'] = '%d' % entry_n             article_id.append(entry_n)             request = request(                 entry.link,                 callback=getattr(self, response.meta['method']),                 dont_filter=response.meta.get('dont_filter', false)             )              request.meta['item'] = item             request.meta['entry'] = entry              yield request         except exception e:             print '%s: %s' % (type(e), e)             print entry

the problem entry_n restarts whenever changes url. that's why list used.

from discussion

the purpose of identifier if item has data missing or includes data isn't needed, can find dictionary right away , refactor code accordingly.

with purpose in mind, i'd suggest generate uuids. same effect, less hassle:

# item definition class scrapyitem(scrapy.item):     source = scrapy.field()     link = scrapy.field()     uuid = scrapy.field() # processing def parse_common(self, response):     ...     item['uuid'] = uuid.uuid4()     ...

Comments

Post a Comment

Popular posts from this blog

html - Outlook 2010 Anchor (url/address/link) -

i'm trying link specific pdf page msoutlook'10 or msword'10, #page=... anchor particularly useful , works fine elsewhere. unfortunately when click [ctr-k] in outlook or winword, links re-formatted assuming unc path. pdf file located on shared drive. using "file:" prefix links open pdf in adobe reader (outside of browser), , "http:" open inside browser. issue seem need open in browser "file:" prefix in order anchor work. know anchors work inside browser. outlook uses windows/explorer default program (based on file extension) seems open in adobe reader neglecting anchor. is aware of solution, link specific page or bookmark of shared-pdf ms outlook and/or winword link? common references: mailermailer.com/...anchor-tags-html-emails campaignmonitor.com/...anchor-links-in-email-newsletters/ stackoverflow.com/...anchor-in-pdf-document
Read more

javascript - Why does running this loop 9 times take 100x longer than running it 8 times? -

consider code: test = function() { } t = new test(); (var = 0; < 8; i++) { result = t instanceof test; } if change number of iterations 8 9 , loop take 100 times longer complete in latest version of firefox (41.0.1). tested on 2 different pcs , magic limit 8. here jsperf test used: http://jsperf.com/instanceof-8-times-vs-9-times does have idea why might happen? seems specific instanceof . not happen if else object, example check property. note: filed bugzilla bug this. jan de mooij mozilla team has posted details in bugzilla thread . here's simplistic interpretation of highly technical answers: in i < 8 case, firefox smart enough hoist result = t instanceof test; statement out of loop (according tests, doesn't seem omit altogether). in i < 9 case, apparently doesn't optimization . why? reason not clear, related fact 9 iterations threshold above function considered "hot" enough run through jit compiler. i < 8 cas...
Read more

Getting gateway time-out Rails app with Nginx + Puma running on Digital Ocean -

following this guide setup app on digital ocean droplet, not working. site not loading , it's throwing: "gateway time-out". the puma server works, since ps aux | grep puma prints: root 15878 0.0 0.4 376832 2168 ? sl 12:50 0:00 puma 2.13.4 (unix:///var/www/myapp/shared/tmp/sockets/myapp-puma.sock) [20150930164940] root 15881 0.0 0.7 903676 3692 ? sl 12:50 0:06 puma: cluster worker 0: 15878 [20150930164940] root 24654 0.0 0.1 11748 916 pts/2 s+ 18:00 0:00 grep --color=auto puma my nginx config: user root; worker_processes 1; events { worker_connections 1024; } http { upstream puma { server unix:///var/www/myapp/shared/tmp/sockets/myapp-puma.sock; } server { listen 80; server_name myapp.com; root /var/www/myapp/current/public; access_log /var/www/myapp/current/log/access.log; error_log /...
Read more