On Fri, Jun 18, 2010 at 2:26 PM, Justin Park <h...@rice.edu> wrote: > But when I change the file access mode into "a", > it returns an error message of "IOError: [Errno 9] Bad file descriptor. " > > What have I done wrong?
"a" is for appending only. You can't read from a file opened in that mode. If you want to both read and append, you should use mode 'r+' or 'a+', depending on whether you want the stream initially positioned at the beginning or end of the file. -- http://mail.python.org/mailman/listinfo/python-list
