Libtorrent: [python] Download a single file

[masudr4n4]

libtorrent version (or branch): master
platform/architecture: Windows 64
compiler and compiler version: VS2015
Language :python

import libtorrent as lt
import libtorrent as lt

ses = lt.session()
ses.listen_on(6881, 6891)

e = lt.bdecode(open("test.torrent", 'rb').read())
info = lt.torrent_info(e)
h = ses.add_torrent(info, "d:\\torrent")

I see there is about 259 Files their by num_files I don't want to download all the files at a time.
I want to only download a single file which index number is 153.I mean download only 153 index file don't_download others.Actually i am not familiar with c++,for that i can not implement it by reading libtorrent api documentation.
I tried to find for python documentation but failed.I will be glad if someone can give me a piece code to solve the problem.

[arvidn]

listen_on() is deprecated, you should not use it.
That overload of add_torrent() is also deprecated. Instead, pass in a add_torrent_params object (in python, that's just a dict). In that dict, set the file priorities to 0 for all files and 1 for file 153.
That's an array of integers.

See: http://libtorrent.org/reference-Core.html#file_priorities

[arvidn]

here's an example: https://github.com/arvidn/libtorrent/blob/RC_1_2/bindings/python/simple_client.py#L14

add file_priorities to the dictionary passed to add_torrent()

[masudr4n4]

priority = []

for i in range(1,260):
    if i != 153:
        priority.append(0) #priority 0 to not download it
    else:
        priority.append(1) #priority 1 where index is 153
h = ses.add_torrent({'ti':info,
                      'save_path':'/singleFile',
                      'file_priorities':priority
                      })

Thanks for reply.
I tried as you told but seems its still downloading all the files.Problem still remain.
please check the params if their is any problem.

[arvidn]

the file indices are 0-based. so your code picks a file off-by-one. Do you actually see all files be downloaded in full? or do you see the file you picked + parts of the two adjacent files?
the latter is expected unless you use a part-file

[masudr4n4]

it should not download any parts of other videos except selected one.I am not able to keep open console for long time for large videos files...thats why i wanting to download a single file at a time.when i got time then i will download another file.I see it fully downloading the selected one + other video part(thos are broken) but selected one is fine to play.

[arvidn]

bittorrent validates and shares data at piece granularity, so that data overlapping with other files has to be downloaded too.