python - Dumping JSON directly into a tarfile -

-

i have large list of dict objects. store list in tar file exchange remotely. have done writing json.dumps() string tarfile object opened in 'w:gz' mode.

i trying piped implementation, opening tarfile object in 'w|gz' mode. here code far:

from json import dump io import stringio import tarfile  stringio() out_stream, tarfile.open(filename, 'w|gz', out_stream) tar_file:     packet in json_io_format(data):         dump(packet, out_stream)

this code in function 'write_data'. 'json_io_format' generator returns 1 dict object @ time dataset (so packet dict).

here error:

traceback (most recent call last):   file "pdml_parser.py", line 35, in write_data     dump(packet, out_stream)   file "/.../anaconda3/lib/python3.5/tarfile.py", line 2397, in __exit__     self.close()   file "/.../anaconda3/lib/python3.5/tarfile.py", line 1733, in close     self.fileobj.close()   file "/.../anaconda3/lib/python3.5/tarfile.py", line 459, in close     self.fileobj.write(self.buf) typeerror: string argument expected, got 'bytes'

after troubleshooting comments, error caused when 'with' statement exits, , tries call context manager __exit__. believe in turn calls tarfile.close(). if remove tarfile.open() call 'with' statement, , purposefully leave out tarfile.close(), code:

with stringio() out_stream:     tarfile.open(filename, 'w|gz', out_stream) tar_file:     packet in json_io_format(data):         dump(packet, out_stream)

this version of program completes, not produce output file 'filname' , yields error:

exception ignored in: <bound method _stream.__del__ of <targile._stream object @ 0x7fca7a352b00>> traceback (most recent call last):   file "/.../anaconda3/lib/python3.5/tarfile.py", line 411, in __del__     self.close()   file "/.../anaconda3/lib/python3.5/tarfile.py", line 459, in close     self.fileobj.write(self.buf) typeerror: string argument expected, got 'bytes'

i believe caused garbage collector. preventing tarfile object closing.

can me figure out going on here?

why think can write tarfile stringio? doesn't work think does.

this approach doesn't error, it's not how create tarfile in memory in-memory objects.

from json import dumps                                                                io import bytesio                                                      import tarfile                                                                         data = [{'foo': 'bar'},                                                                       {'cheese': none},                                                                     ]                                                                              filename = 'fnord'                                                                    bytesio() out_stream, tarfile.open(filename, 'w|gz', out_stream) tar_file:     packet in data:                                                                       out_stream.write(dumps(packet).encode())

Comments

Post a Comment

Popular posts from this blog

mysql - Dreamhost PyCharm Django Python 3 Launching a Site -

-
i'm new python/django , created simple django website using pycharm. site works fine running on computer, i'm lost when comes taking site onto host (dreamhost). i'm able upload files correct directories fine, , believe made correct changes database on mysql. i'm not sure go there though. right now, page shows files rather site. direction appreciated. much! you should not run django application using python manage.py runserver on production. how run application on django depends on server (apache, nginx) want use for apache - https://docs.djangoproject.com/en/1.10/howto/deployment/wsgi/modwsgi/ for nginx - https://www.digitalocean.com/community/tutorials/how-to-serve-django-applications-with-uwsgi-and-nginx-on-ubuntu-14-04 the mysql database should, of course, exist , have correct credentials. or, if choose use sqlite, file should accessible, readable , writable www-user (may different depending on linux distributive)
Read more

java - Sending SMS with SMSLib and Web Services -

-
i have made rest web service send smss using hsdpa usb modem. using smslib in java send smss. every time web service invoked, create gateway start service, send message, stop service , remove gateway. takes 20 seconds each message. found starting service takes lot of time. part of code use send smss service.getinstance().addgateway(gateway); service.getinstance().startservice(); outboundmessage msg = new outboundmessage(phonenumber, message); if (service.getinstance().sendmessage(msg)) { result = "message sent successfully!!"; } else { result = "could not send message."; } service.getinstance().stopservice(); service.getinstance().removegateway(gateway);//remove gateway is there way can start service once if not started , use send message when ever web service invoked? why dont group messages , send in 1 go? service.getinstance().sendmessages(messa...
Read more

java - How to resolve The method toString() in the type Object is not applicable for the arguments (InputStream) -

-
i'm trying read json file local machine. @path("/") public class jsonparsing { file f = new file("file.json"); if (f.exists()){ inputstream = new fileinputstream("file.json"); string jsontxt = ioutils.tostring(is); system.out.println(jsontxt); jsonobject json = new jsonobject(jsontxt); string = json.getstring("1000"); system.out.println(a); } } but i'm getting error in tostring() method. possible read .txt file containing json object local machine? if possible, how done? firstly: whenever ask question- add imports well. secondly: yes possible read .txt file containing json object. steps: 1. add maven dependency in pom.xml - <dependency> <groupid>com.googlecode.json-simple</groupid> <artifactid>json-simple</artifactid> <version>1.1.1</version> </dependency> or add jar of dependency. 2.import...
Read more