I've been reading 'Core Python Programming (2nd Edition)'. I have been given the following script:
#!/usr/bin/env python 'makeTextFile.py -- create text file' import os # get filename while True: fname = raw_input('Enter file name: ') 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 NEWLINE line terminator fobj = open(fname, 'w') fobj.write('\n'.join(all)) fobj.close() print 'DONE!' I have been asked to replace this while loop with a try and except clause: while True: fname = raw_input('Enter file name: ') if os.path.exists(fname): print"*** ERROR: '%s' already exists" % fname else: break I'm not sure how to do this. I looked at the back of the book, and I don't see an exception that is raised when a previously existing file is found. Any hints? _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor