import osls = os.linesep     #Win is ‘\r\n‘ and Linux is ‘\n‘fileName = raw_input(‘Please enter your file name here:‘)while True:    if os.path.exists(fileName):        print ‘The file "%s" has already existed‘ %fileName        exit(0)    else:        breakprint "Enter what you can type here:"lines = list()  #Create an empty list#lines = []while True:    inputLine = raw_input(‘>‘)    if inputLine == ‘ ‘:        break    else:        lines.append(inputLine)fileHandler = open(fileName, ‘w‘)fileHandler.writelines(‘%s%s‘ %(n, ls) for n in lines)fileHandler.close()print ‘Write succeed!!‘

 1 import os 2 fileName = raw_input(‘Please your file name:‘) 3 print ‘***Begin to read file.‘ 4 try: 5     fileHandler = open(fileName, ‘r‘) 6 except IOError, e: 7     print "*** Open file failed:", e 8 else: 9     for line in fileHandler:10         print line,                 #Notice the comma11 finally:12     print ‘***Begin to close file.‘13 fileHandler.close()