On 23 Mar 2005 16:05:58 -0800, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > I want to pass and index number and a file name from the command line. > This index number corresponds to a buffer. I need to maintain 2 such > buffers for my test. > > In C you would do someting like this > unsigned char buf1[512]; > > In python is this as simple as? > buf 1 = 512 > buf 2 = 512 > And how do i keep track of buf1 and buf2 > Thanks.
Okay, I've been reading some of your posts in the last few weeks, and it seems we're still not past the "Python doesn't treat memory like C does" meme. I *think* what your C code is doing is creating a 512 byte long unsigned char containing increasing values. i.e. buf[0] == 0, buf[1] == 2, etc. I have no idea why, but you get that. Anyway, in Python, the way we create a list containing values like that is with a library function called 'range' range(10) = [0,1,2,3,4,5,6,7,8,9] range(1,11) = [1,2,3,4,5,6,7,8,9,10] range(10,0,-1) = [10,9,8,7,6,5,4,3,2,1] So in order to create a list (a list is python object, http://docs.python.org/tut/node5.html#SECTION005140000000000000000 for more information) that contains the numbers from 0 to 511, you would do. mylist = range(512) As for your other, implied, question, about passing a filename and a number to your program, you would do this: import sys filename = sys.argv[1] code = int(sys.argv[2]) So, for instance, a program which writes the numbers from 0 to 511 to a file, as passed on the commandline, would probably look like this: @ import sys @ @ filename = sys.argv[1] @ code = int(sys.argv[2]) @ @ if code == 1: @ f = file(filename, 'w') @ for x in range(512): @ f.write("%d\n" % x) @ f.close() (The @ marks are to preserve the indentation on usenet, I believe google strips them). I hope that helps you. -- Stephen Thorne Development Engineer -- http://mail.python.org/mailman/listinfo/python-list
