# using commandline to run a program and files

def process_datafile(filename):
    """load specified data file and process data"""
    # code to read file data
    # code to process data and show or return result
    print "Test only, file =", filename   # testing

if __name__ == '__main__':
    import sys

    # run the progam from the commandline and specify the data file(s) to be loaded
    # something like   myProgram data1.dat data2.dat
    if len(sys.argv) > 1:
        # sys.argv is a list eg. ['C:/Python24/Atest/myProgram.py', 'data1.dat', 'data2.dat']
        # sys.argv[0] is program filename, slice it off with sys.argv[1:]
        # using for loop, more than one datafile can be processed
        for filename in sys.argv[1:]:
            process_datafile(filename)
    else:
        print "usage myProgram datafile1 [datafile2 ...]"