When I first came to Python I did a lot of C style loops like this:
for i in range(len(myarray)):
print myarray[i]
Obviously the more pythonic way is:
for i in my array:
print i
The python way is much more succinct. But a lot of times I'll be looping
through something, and if a certain condition is met, need to access the
previous or the next element in the array before continuing iterating. I
don't see any elegant way to do this other than to switch back to the C
style loop and refer to myarray[i-1] and myarray[i+1], which seems
incredibly silly given that python lists under the hood are linked
lists, presumably having previous/next pointers although I haven't
looked at the interpeter source.
I could also enumerate:
for i, j in enumerate(myarray):
print myarray[i], j # Prints each element twice
And this way I can keep referring to j instead of myarray[i], but I'm
still forced to use myarray[i-1] and myarray[i+1] to refer to the
previous and next elements. Being able to do j.prev, j.next seems more
intuitive.
Is there some other builtin somewhere that provides better functionality
that I'm missing?
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