Alex Snast <[EMAIL PROTECTED]> wrote:
> Hello
>
> I'm new to python and i can't figure out how to write a reverse for
> loop in python
>
> e.g. the python equivalent to the c++ loop
>
> for (i = 10; i >= 0; --i)
>
The exact equivalent would be:
for i in range(10, -1, -1): print i
except you virtually never want to do that in Python. Don't expect just to
translate statement by statement from one language to another: normally in
Python you will iterate directly over the sequence you want to process
rather than trying to count loop indices with all the telegraph pole errors
that result.
The usual way to iterate over a sequence in reverse is:
for x in reversed(seq): print x
although if you know it is a list, string or other object that supports
extended slicing you can also do:
for x in seq[::-1]: print x
this may be less clear than using 'reversed', but does allow you to specify
an explicit start, stop and step if you want to do only part of the
sequence.
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