SCons also allows you to identify the output file and input source files using Python keyword arguments target and source. The Python syntax for this is:

src_files = Split('main.c file1.c file2.c')
Program(target='program', source=src_files)
    

Because the keywords explicitly identify what each argument is, the order does not matter and you can reverse it if you prefer:

src_files = Split('main.c file1.c file2.c')
Program(source=src_files, target='program')
    

Whether or not you choose to use keyword arguments to identify the target and source files, and the order in which you specify them when using keywords, are purely personal choices; SCons functions the same regardless.