multithreading - Error in Sending a mp3 files using Python -


i trying send mp3 files through python. here following code -

for v in videos:      thread(target=video_download, args=(handler,v,videos)).start()   def video_download(handler,v,videos):       try:         ydl_opts['format'] = 'mp4'         ydl(ydl_opts).download([v])     except:         ydl_opts['format'] = 'best'         ydl(ydl_opts).download([v])          mp3  = open('./'+v+'.mp3', "r+").read()     handler.send_header('content-disposition', 'attachment; filename=%s.mp3' % videos[v])     handler.wfile.write(mp3)     handler.end_headers()

it downloads m4a format video youtube , converts mp3 files. download , conversion part working perfectly, uses threading, while sending file using wfile.write() receive following error

traceback (most recent call last):   file "/system/library/frameworks/python.framework/versions/2.7/lib/python2.7/threading.py", line 810, in __bootstrap_inner     self.run()   file "/system/library/frameworks/python.framework/versions/2.7/lib/python2.7/threading.py", line 763, in run     self.__target(*self.__args, **self.__kwargs)   file "/users/keshav/documents/github/webserver/webserver/downld.py", line 37, in video_download     handler.send_header('content-disposition', 'attachment; filename=%s.mp3' % videos[v])   file "/system/library/frameworks/python.framework/versions/2.7/lib/python2.7/basehttpserver.py", line 401, in send_header     self.wfile.write("%s: %s\r\n" % (keyword, value))   file "/system/library/frameworks/python.framework/versions/2.7/lib/python2.7/socket.py", line 324, in write     self.flush()   file "/system/library/frameworks/python.framework/versions/2.7/lib/python2.7/socket.py", line 303, in flush     self._sock.sendall(view[write_offset:write_offset+buffer_size]) attributeerror: 'nonetype' object has no attribute 'sendall'

the same thing works fine if implement multiprocessing instead of threading. processing serially instead of parallel.


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