On Friday, 22 November 2013 18:29:12 UTC-8, Steven D'Aprano wrote: > On Fri, 22 Nov 2013 17:42:07 -0800, Bhanu Karthik wrote: > > > > > please help me.. what does the following line do? > > > > > > read_sockets,write_sockets,error_sockets = > > > select.select(CONNECTION_LIST,[],[]) > > > > The select.select function takes three arguments (plus an optional > > fourth): > > > > select.select(read_list, write_list, exception_list) > > > > Each list should a list of the file descriptors you want to wait for. On > > Windows, only sockets are valid file descriptors. On Unix or Linux, you > > can use sockets, open file objects, or low-level file descriptors. > > > > In this case, you only pass CONNECTION_LIST, the others are empty lists > > []. CONNECTION_LIST is probably a list of sockets to be read. When they > > are ready for reading, select() will return three lists: > > > > read_sockets - a list of the sockets open for reading > > > > write_sockets and error_sockets should both be empty lists, since you > > didn't request any of those to be opened. > > > > > > > > -- > > Steven
Thank you ,your message answered the question exactly. instead of using select.select,can we do like below? read_sockets=connection_list write_sockets=[] error_sockets=[] -- https://mail.python.org/mailman/listinfo/python-list