Fetch torrents names from magnet URLs

magname.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Description- Fetch torrents names from magnet URLs
# Usage- Supply a filename argument containing magnet URLS or use '-' for stdin

import sys
import time
import libtorrent as lt

IFACE = "0.0.0.0"
PORT = "6881"

if (len(sys.argv) != 2):
    sys.stderr.write("Usage: {} filename/-\n".format(sys.argv[0]))
    sys.exit(1)    
    
if (sys.argv[1] == "-"):
    r = sys.stdin.readlines() 
else: 
    f=open(sys.argv[1], "r")
    r=f.readlines()
    
sess = lt.session({'listen_interfaces': IFACE + ':' + PORT}) 

spinner = ['-', '\\', '|', '/']
spinner_pos = 0

for line in r: 
    if line == '\n':
        continue
    
    line=line.rstrip() 
    h = sess.add_torrent({ 
        'save_path': "./" ,
        'info_hash': lt.parse_magnet_uri(line)['info_hash']
        })
    h.prioritize_files([0]*1000) 
    s = h.status()
     
    while True:
        try: 
            print("\r" + h.torrent_file().name())
            break 
        except:
            sys.stdout.write("\r" + 
                    spinner[spinner_pos % len(spinner)]) 
            sys.stdout.flush()
            time.sleep(0.05) 
            spinner_pos = spinner_pos + 1
            continue
    
    spinner_pos = 0