for…in在python中的例子
#!/usr/bin/env python 'makeTextFile.py -- create text file' import os ls = os.linesep # get filename while True: if os.path.exists(fname): print"*** ERROR: '%s' already exists" % fname else: break # get file content (text) lines all = [] print "\nEnter lines ('.' by itself to quit).\n" # loop until user terminates input while True: entry = raw_input('> ') if entry == '.': break else: all.append(entry) # write lines to file with proper line-ending fobj = open(fname, 'w') fobj.writelines(['%s%s' % (x, ls) for x in all]) fobj.close() print 'DONE!'