Cycle around a sequence
breamoreboy at yahoo.co.uk
Wed Feb 8 02:10:28 CET 2012
I'm looking at a way of cycling around a sequence i.e. starting at some
given location in the middle of a sequence and running to the end before
coming back to the beginning and running to the start place. About the
best I could come up with is the following, any better ideas for some
definition of better?
PythonWin 2.7.2 (default, Jun 12 2011, 15:08:59) [MSC v.1500 32 bit
(Intel)] on win32.
Portions Copyright 1994-2008 Mark Hammond - see 'Help/About PythonWin'
for further copyright information.
>>> from itertools import chain
>>> g = chain((a[i] for i in xrange(4, 10, 1)), (a[i] for i in xrange(4)))
>>> for x in g: print x,
4 5 6 7 8 9 0 1 2 3
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