I have the following that I am using to extract "numbers' from a file
prompt1 = raw_input('What is the file from which you would like a list of patent numbers? ') p1 = open(prompt1,'rU') s = p1.readlines() prompt2 = raw_input('What is the name of the file to which you would like to save the list of patent numbers? ') p2 = open(prompt2,'aU') patno = re.compile(r'(\d{1})[\s,.]+(\d{3})[\s,.]+(\d{3})') for line in s: jay = patno.findall(line) print jay which yields the following [('1', '337', '912')] [('1', '354', '756')] [('1', '360', '297')] [('1', '328', '232')] [('1', '330', '123')] [('1', '362', '944')] [('1', '350', '461')] [('1', '355', '991')] [('1', '349', '385')] [('1', '350', '521')] [('1', '336', '542')] [('1', '354', '922')] [('1', '338', '268')] [('1', '353', '682')] [('1', '343', '241')] [('1', '359', '852')] [('1', '342', '483')] [('1', '347', '068')] [('1', '331', '450')] if i try to write to a file instead of print to the screen using p2.write(jay) i get the message Traceback (most recent call last): File "patentno.py", line 12, in ? p2.write(jay) TypeError: argument 1 must be string or read-only character buffer, not list I f I try writelines i get Traceback (most recent call last): File "patentno.py", line 12, in ? p2.writelines(jay) TypeError: writelines() argument must be a sequence of strings jay-mutter-iiis-computer:~/documents/programming/python/patents jlm1$ So what do i have above ? A list of tuples? How do I send the output to a file? Is there a way to get the output as 1337912 instead of [('1', '337', '912')] ? And as always thanks in advance for the help. jay Mutter _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor