jfong at ms4.hinet.net wrote: >> h:\Temp\XL-Sudoku-Solver-master>py -m xl_sudoku_solver >> Great! it works. Thank you, peter. >> By the way, can you explain what these two command difference means? with > or without a "-m". Or pointing where the document is. Thanks ahead:-) > https://docs.python.org/dev/using/cmdline.html#cmdoption-m