On 11/03/2022 21:33, wfdc wrote:
How about something like

def index(self, x):
    return next(i for i, a in enumerate(self) if a == x)

Including start and end:

def index(self, x, start=0, end=-1):
    return next(i for i, a in tuple(enumerate(self))[start:end] if a == x)
No cigar.  If the element is not found it raises StopIteration.  It should raise ValueError.
Rob Cliffe


------- Original Message -------
On Friday, March 11th, 2022 at 4:02 PM, Rob Cliffe <rob.cli...@btinternet.com> wrote:



On 11/03/2022 19:30, wfdc wrote:

> I could (I believe) write "count" as an (inefficient) 1-liner, but not "index". I suggest it's harder than you think. (Try it!)

How much harder? Can you post your candidate?
It was you that said it could be a 1-liner. The burden of proof is on you, if you still want to argue the point.
Rob Cliffe

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