On Jun 15, 3:55 pm, Mark Lawrence <breamore...@yahoo.co.uk> wrote: > On 15/06/2013 11:24, Denis McMahon wrote: > > > > > > > > > > > On Sat, 15 Jun 2013 10:05:01 +0000, Steven D'Aprano wrote: > > >> On Sat, 15 Jun 2013 02:42:55 -0700, subhabangalore wrote: > > >>> Dear Group, > > >>> I am trying to search the following pattern in Python. > > >>> I have following strings: > > >>> (i)"In the ocean" (ii)"On the ocean" (iii) "By the ocean" (iv) "In > >>> this group" (v) "In this group" (vi) "By the new group" > >>> ..... > > >>> I want to extract from the first word to the last word, where first > >>> word and last word are varying. > > >>> I am looking to extract out: > >>> (i) the (ii) the (iii) the (iv) this (v) this (vi) the new > >>> ..... > > >>> The problem may be handled by converting the string to list and then > >>> index of list. > > >> No need for a regular expression. > > >> py> sentence = "By the new group" > >> py> words = sentence.split() > >> py> words[1:-1] > >> ['the', 'new'] > > >> Does that help? > > > I thought OP wanted: > > > words[words[0],words[-1]] > > > But that might be just my caffeine deprived misinterpretation of his > > terminology. > > >>> sentence = "By the new group" > >>> words = sentence.split() > >>> words[words[0],words[-1]] > Traceback (most recent call last): > File "<stdin>", line 1, in <module> > TypeError: list indices must be integers, not tuple > > So why would the OP want a TypeError? Or has caffeine deprivation > affected your typing skills? :)
:-) I guess Denis meant (words[0], words[-1]) To the OP: You have the identity: words == [words[0]] + words[1:-1] + [words[-1]] So take your pick of what parts of the expression you want (and discard what you dont want). [The way you've used 'extract' is a bit ambiguous] -- http://mail.python.org/mailman/listinfo/python-list
