As alex23 already indicated you created a recursive data-structure (by inserting a reference to the list into the second place of the list) and the interpreter handles this gracefully by showing [...]. In case you really want to insert the lists members into the second place you can assign a copy of the list. values = [0,1,2] values[1] = values[:] 2013年7月26日 Thanatos xiao <yanxiaopei199 at gmail.com> > >>> values = [0, 1, 2]>>> values[1] = values>>> values[0, [...], 2] >> why?? >>> -- > http://mail.python.org/mailman/listinfo/python-list >>-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.python.org/pipermail/python-list/attachments/20130726/cfbfa98d/attachment.html>