How to iterate a sequence, with skipping the first item?

[ray]

A container object provides a method that returns an iterator object.
I need to iterate the sequence with that iterator, but need to skip
the first item. I can only iterate the whole sequence with:
for x in container.iterChildren():
How to skip the first item? It seems that it's a simple question.
Could somebody help me? Thanks.

[alex23]

On Aug 12, 4:51*pm, ray <[e-mail]:

A container object provides a method that returns an iterator object.
I need to iterate the sequence with that iterator, but need to skip
the first item. I can only iterate the whole sequence with:
for x in container.iterChildren():
How to skip the first item? It seems that it's a simple question.
Could somebody help me? Thanks.

Does the for loop -have- to contain the reference to iterChildren? If
you can modify that, you can always manually step past the first item:

children = container.iterChildren()
children.next()
for x in children: ...

[Calvin Spealman]

i = iter(container.iterChildren())
i.next()
for x in i:
...

On Tue, Aug 12, 2008 at 2:51 AM, ray <ha*****@gmail.comwrote:

A container object provides a method that returns an iterator object.
I need to iterate the sequence with that iterator, but need to skip
the first item. I can only iterate the whole sequence with:
for x in container.iterChildren():
How to skip the first item? It seems that it's a simple question.
Could somebody help me? Thanks.
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[Paul Rubin]

ray <ha*****@gmail.comwrites:

for x in container.iterChildren():
How to skip the first item? It seems that it's a simple question.
Could somebody help me? Thanks.

First solution:

c = container.iterChildren()
c.next() # skip first item
for x in c: ...

Second solution:

from itertools import islice
for x in islice(container.iterChildren(), 1, None): ...

I like the second solution better but it's a matter of preference.

[Gabriel Genellina]

En Tue, 12 Aug 2008 03:51:17 -0300, ray <ha*****@gmail.comescribi�:

A container object provides a method that returns an iterator object.
I need to iterate the sequence with that iterator, but need to skip
the first item. I can only iterate the whole sequence with:
for x in container.iterChildren():
How to skip the first item? It seems that it's a simple question.
Could somebody help me? Thanks.

it = container.iterChildren()
it.next() # consume first item
for x in it:
# process remaining items

--
Gabriel Genellina

[ray]

Thanks you guys. Now I understand the -for- loop mechanism.