A question about reference in Python.
James Mills
prologic at shortcircuit.net.au
Mon Dec 8 01:17:57 EST 2008
On Mon, Dec 8, 2008 at 4:13 PM, Chris Rebert <clp at rebertia.com> wrote:
> The following three lines serve no purpose and can only lead to confusion:
>> value = None
>> prev = None
>> next = None
You are absolutely right :)
Updated code:
#!/home/jmills/bin/python -i
class Node(object):
def __init__(self, value, prev=None, next=None):
self.value = value
self.prev = prev
self.next = next
class List(object):
def __init__(self, *seq):
if seq:
first = prev = node = None
for x in seq:
if not first:
first = Node(x)
prev = node = first
else:
node = Node(x, prev)
prev.next = node
prev = node
self.data = first
else:
self.data = None
def __getitem__(self, x):
node = self.data
for i in xrange(x):
node = node.next
return node.value
x = List(0, 1, 2, 3)
cheers
Jaems
PS: Sorry Chris :)
--
--
-- "Problems are solved by method"
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