Jerry Sievers wrote:
I'd like to know;
1. what the Ellipsis object or ... syntax is used for
Use the Numeric (or numarray) package to really see these in use.
Otherwise, you mostly get to implement it yourself.
> 2. what a slice [..., j:k:l] does
Again, see numeric. Essentially, select parts of a matrix (or higher
dimensional array) based on a stride in the last dimension.
3. how slices are applied to object of mapping types
One way to investigate this interactively:
class CheckOut(object):
def __init__(self, name=None):
self.name = name or str(self)
def __getitem__(self, *args, **kwargs):
print '%s._gi_(*%r, **%r):' % (self.name, args, kwargs),
return input()
>>> c = CheckOut('a')
>>> b = c[1, ...]
c.gi(*(1, Ellipsis), **{}): self.name * 7
>>> b
'aaaaaaa'
--Scott David Daniels
[EMAIL PROTECTED]
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