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 -- https://mail.python.org/mailman/listinfo/python-list
