ast <ast at invalid> writes: >> li = [] >> li.append(li) >> li > [[...]] > >>li[0][0][0][0] > [[...]] > > That's funny > You made a list whose only element is itself. In [1]: li = [] In [3]: li.append(li) In [4]: li[0] is li Out[4]: True -- Pieter van Oostrum <pieter at vanoostrum.org> www: http://pieter.vanoostrum.org/ PGP key: [8DAE142BE17999C4]