Python's list.index(x) throws an exception if the item doesn't exist. Is there a better way to do this that doesn't require handling exceptions?

The returned index is computed relative to the beginning of the full sequence rather than the start argument. Caveats Linear time-complexity in list length An index call checks every element of …

Of course the question asks specifically about lists so the best solution is to use the try-except method, however the speed improvements (at least 20x here compared to try-except) offered …

172 Ultimately it probably doesn't have a safe .get method because a dict is an associative collection (values are associated with names) where it is inefficient to check if a key is present …

Jul 9, 2012 · AttributeError: 'list' object has no attribute 'rindex' Is there a way to get this without having to construct a big loop? I'd prefer not to use the reverse method if it can be avoided, as …

May 6, 2011 · The "Index" that your link is talking about is the same as Get Item in the python.org wiki. You can see in the cpython source code that the index method is doing an O (n) search …

Called to implement operator.index(), and whenever Python needs to losslessly convert the numeric object to an integer object (such as in slicing, or in the built-in bin(), hex() and oct() …

Dec 13, 2016 · How do I remove an element from a list by index? I found list.remove(), but this slowly scans the list for an item by value.

1 So for my assignment I must find a way in which I can work around this problem of printing 'YES' if a list contains the elements 1,2,3 in the consecutive order. It does not work if the list …

index() will give the first occurrence of an item in a list. Is there a neat trick which returns all indices in a list for an element?