lmac wrote: > Hi there, > i want to use an long int from an list which i got from my function > find_lineno(). > But i got this error and i don't understand why i can not use this long > as an argument.
You have the arguments to file.seek() reversed. > Where do i find a good documentation on errors so that i complete > understand what > the heck is going on. >From http://docs.python.org/lib/bltin-file-objects.html seek( offset[, whence]) Set the file's current position, like stdio's fseek(). The whence argument is optional and defaults to 0 (absolute file positioning); other values are 1 (seek relative to the current position) and 2 (seek relative to the file's end). Kent > Many thanks. > > ERROR: > --------------------------------------------------- > Traceback (most recent call last): > File "./extrmails.py", line 42, in ? > inputfile.seek(0,li) > IOError: [Errno 22] Invalid argument > --------------------------------------------------- > > > CODE-START: > ----------------------------------------------------------------------------- > > inputfile=open("mails","rt") > > # -------------------------------------------------------------------------- > def reset_inputfile(): > inputfile.seek(0,0) > > # -------------------------------------------------------------------------- > def find_lineno(string): > f = -1 > a = "start" > found_lines = [] > reset_inputfile() > > while len(a) != 0: > a = inputfile.readline() > f = a.find(string) > if f != -1: > found_lines.append(inputfile.tell()) > > return found_lines > > # -------------------------------------------------------------------------- > > from_lineno=find_lineno("From:") > subj_lineno=find_lineno("Subject:") > > print len(subj_lineno) > print len(from_lineno) > > reset_inputfile() > > for li in subj_lineno: > inputfile.seek(0,li) <------ ??????? > ....... > ...... > -------------------------------------------------------------------------- > CODE-END > > _______________________________________________ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor > _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
