python enumerate reverse
Python: reverse enumerate. This morning, I was needed to iterate trough a list from the end to the start and getting the index in addition to the ..., I would try to make a reverse list first then you may use enumerate() .... answer in a similar question: Traverse a list in reverse order in Python.,enumerate() cannot count down, only up. Use a itertools.count() object instead: from itertools import izip, count for index, item in izip(count(len(data) - 1, -1), ... , We don't want to change the order in existing list, just want to iterate in reverse. Now let's see how to do this using different techniques, ..., How about using zip instead with a reversed range? >>> zip(range(9, -1, -1), range(10)) [(9, 0), (8, 1), (7, 2), (6, 3), (5, 4), (4, 5), (3, 6), (2, 7), (1, ..., gmail.com> wrote:>>> I had occasion to write something like this:>>>>>> for i, n in reversed(enumerate(x)): pass>>>>>> Of course this fails with ...,If you need the index, the simplest way is to subtract the index returned by enumerate(reversed()) from len()-1 . enumerate() doesn't take a step argument. So, the ugliest option xrange(len(xs)-1,-1,-1) is the fastest. , That might not be the most pythonic approach, but you could reuse the code provided by the documentation on enumerate to re-implement your ...
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Christophe Simonis @ Tiny: Python: reverse enumerate
Python: reverse enumerate. This morning, I was needed to iterate trough a list from the end to the start and getting the index in addition to the ... http://christophe-simonis-at-t How can I use enumerate to count backwards? - Stack Overflow
I would try to make a reverse list first then you may use enumerate() .... answer in a similar question: Traverse a list in reverse order in Python. https://stackoverflow.com How to get reversed enumerate in python2? - Stack Overflow
enumerate() cannot count down, only up. Use a itertools.count() object instead: from itertools import izip, count for index, item in izip(count(len(data) - 1, -1), ... https://stackoverflow.com Python : Different ways to Iterate over a List in Reverse Order ...
We don't want to change the order in existing list, just want to iterate in reverse. Now let's see how to do this using different techniques, ... https://thispointer.com Python enumerate reverse index only - Stack Overflow
How about using zip instead with a reversed range? >>> zip(range(9, -1, -1), range(10)) [(9, 0), (8, 1), (7, 2), (6, 3), (5, 4), (4, 5), (3, 6), (2, 7), (1, ... https://stackoverflow.com Re: reversed(enumerate(x)) « python-list « ActiveState List Archives
gmail.com> wrote:>>> I had occasion to write something like this:>>>>>> for i, n in reversed(enumerate(x)): pass>>>>>> Of course this fails with .... https://code.activestate.com Traverse a list in reverse order in Python - Stack Overflow
If you need the index, the simplest way is to subtract the index returned by enumerate(reversed()) from len()-1 . enumerate() doesn't take a step argument. So, the ugliest option xrange(len(xs)-1,... https://stackoverflow.com What is the most pythonic way to have inverse enumerate of a list ...
That might not be the most pythonic approach, but you could reuse the code provided by the documentation on enumerate to re-implement your ... https://stackoverflow.com |