Pickling issue with python pathos - 


import pathos.multiprocessing mp class model_output_file():     """     class read model output files     """     def __init__(self, ftype = ''):         """         constructor         """         # create sqlite database in analysis directory         self.db_name = 'sqlite:///' + constants.anly_dir + os.sep + ftype + '_' + '.db'         self.engine  = create_engine(self.db_name)         self.ftype   = ftype      def parse_dgn(self, fl):         df      = pandas.read_csv(...)         df.to_sql(self.db_name, self.engine, if_exists='append')      def collect_epic_output(self, fls):         pool = mp.processingpool(4)         if(self.ftype == 'dgn'):             pool.map(self.parse_dgn, fls)         else:             logging.info( 'wrong file type')  if __name__ == '__main__':     list_fls = fnmatch.filter(...)     obj = model_output_file(ftype = 'dgn')     obj.collect_model_output(list_fls)

in code above, using pathos multiprocessing library avoid python multiprocessing issues classes. getting pickling error:

  pool.map(self.parse_dgn, fls)   file "c:\anaconda64\lib\site-packages\pathos-0.2a1.dev0-py2.7.egg\pathos\multiprocessing.py", line 131, in map     return _pool.map(star(f), zip(*args)) # chunksize   file "c:\anaconda64\lib\multiprocessing\pool.py", line 251, in map     return self.map_async(func, iterable, chunksize).get()   file "c:\anaconda64\lib\multiprocessing\pool.py", line 567, in     raise self._value cpickle.picklingerror: can't pickle <type 'function'>: attribute lookup __builtin__.function failed

how fix this?

i'm pathos author. getting cpickle.picklingerror… should not pathos. make sure have multiprocess installed, , if do, have c++ compiler. can check pickling errors importing dill, , doing dill.copy(self.parse_dgn) inside class, or externally using instance of class. if works, have installation issue, pathos finding python standard library multiprocessing. if so, need install compiler… microsoft visual studio community. see: github.com/mmckerns/tuthpc. make sure rebuild multiprocess after install of ms compiler.


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