[EMAIL PROTECTED] wrote: > Reading: > > http://docs.python.org/ref/slicings.html > > it would seem to indicate that the ff will work: > > L=[0, 1, 2, 3, 4, 5, 6, 7, 8, 9] > > however, you get: > > >>> l[3:4:,5:8:] > Traceback (most recent call last): > File "<pyshell#153>", line 1, in ? > l[3:4:,5:8:] > TypeError: list indices must be integers > > in Python 2.3... are they only available in 2.4?
Lists are one-dimensional. They can only take one slice, not two. > Also, > > http://www.python.org/doc/2.3/whatsnew/section-slices.html > > mentions that: > > "Ever since Python 1.4, the slicing syntax > has supported an optional third 'step' or 'stride' > argument. For example, these are all legal Python syntax: > L[1:10:2], L[:-1:1], L[::-1]." > > and yet, we see in: > > http://pyds.muensterland.org/weblog/2004/12/25.html > > that something as simple as: > > l = range(0,10) > print l[1:5] # this works > print l[1:5:2] # this barfs > > fails in Python 2.2. What gives? The syntax was there since 1.4 for the Numeric module[1], but the list object itself wasn't updated to utilize that syntax until later. [1] http://numeric.scipy.org -- Robert Kern [EMAIL PROTECTED] "In the fields of hell where the grass grows high Are the graves of dreams allowed to die." -- Richard Harter -- http://mail.python.org/mailman/listinfo/python-list
