import os 'A script for refreshing all drawings in a specified directory' tpx_path = '.........\\TpX.exe' pics_path = '.........\\' os.chdir(pics_path) files = os.listdir(pics_path) for input_filename0 in files: if input_filename0[-4:] != '.TpX': continue input_filename0 = '%s%s'%(pics_path,input_filename0) code = os.system('%s -f"%s" -o'%(tpx_path,input_filename0)) print input_filename0, code