SYS is a tool that interacts with the Python interpreter.
First Look at dir (SYS)
>>>ImportSYS>>>dir (sys) ['__displayhook__','__doc__','__excepthook__','__interactivehook__','__loader__','__name__','__package__','__spec__','__stderr__','__stdin__','__stdout__','_clear_type_cache','_current_frames','_debugmallocstats','_enablelegacywindowsfsencoding','_getframe','_git','_home','_xoptions','api_version','argv','Base_exec_prefix','Base_prefix','Builtin_module_names','Byteorder','call_tracing','Callstats','Copyright','Displayhook','Dllhandle','Dont_write_bytecode','Exc_info','Excepthook','Exec_prefix','executable','Exit','Flags','Float_info','Float_repr_style','Get_asyncgen_hooks','Get_coroutine_wrapper','Getallocatedblocks','Getcheckinterval','getdefaultencoding','getfilesystemencodeerrors','getfilesystemencoding','GetProfile','Getrecursionlimit','Getrefcount','getsizeof','Getswitchinterval','Gettrace','getwindowsversion','Hash_info','hexversion','Implementation','Int_info','Intern','is_finalizing','maxsize','Maxunicode','Meta_path','Modules','Path','Path_hooks','Path_importer_cache','Platform','prefix','Set_asyncgen_hooks','Set_coroutine_wrapper','Setcheckinterval','Setprofile','Setrecursionlimit','Setswitchinterval','Settrace','stderr','stdin','stdout','Thread_info','version','Version_info','warnoptions','winver']
Look at the usual methods:
1. SYS.ARGV Command Line Parameters
2, Sys.exit (n)
3, Sys.version
4, Sys.maxint
5, Sys.path
6, Sys.platform
7, Sys.stdout.write ()
8, Sys.
Advanced 12th Class of the Python module sys