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]

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:
...

 

[Paul Rubin]

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]

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

 

[ray]

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