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pythonlistsequential

python list sequential numbers

I am trying to figure out a way to find whether all the integers in my list are increasing sequentially. If any numbers are non-sequential I want to get the index.

mylist = [1,2,3,2]

So, is 2 more than 1 (yes), is 3 more than 2 (yes), is 2 more than 3(no, get index).

I can compare an unsorted list against a sorted list to work out if it is sequential, but I also want to establish the index. Is there a way to do this?

Thanks Toby

Solution

  • I guess you are looking for something like this:

    >>> mylist = [1,2,3,2,3,5,6,3,7,8,6]
>>> [i+1 for i in range(len(mylist)-1) if mylist[i]>mylist[i+1]]
[3, 7, 10]