Pythonic way to detect final iteration of a loop [duplicate]

Question

Currently, I do something like

count = 0
for item in list:
  if count == len(list) - 1:
      <do something>
   else:
      <do something else>
   count += 1

Is there a more Pythonic way to recognize the final iteration of a loop - for both lists and dictionaries?

Do you really need to know if its the last element? Usually you can get around this by using ', '.join(list) for example. — Caramiriel
– Caramiriel, Commented Jul 22, 2019 at 8:18
@T.Nel it wasn't flagged as unhelpful, it was flagged as a duplicate, which it is. — juanpa.arrivillaga
– juanpa.arrivillaga, Commented Jul 22, 2019 at 8:33
@Mawg of the two questions linked to as duplicates at the top. — juanpa.arrivillaga
– juanpa.arrivillaga, Commented Jul 22, 2019 at 10:49

LeopardShark · Accepted Answer · 2019-07-22 08:15:33Z

5

You can improve on it using enumerate():

for i, item in enumerate(list):
    if i == len(list) - 1:
        <do something>
    else:
        <do something else>

answered Jul 22, 2019 at 8:15

LeopardShark

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1 Comment

you only need to calculate last item in list once last_item = list[-1]