"Deleting a list item while iterating over it" has improper example or explanation

[nolar]

In the "Deleting a list item while iterating over it" trick, in the list_1 example, del actually deletes the item variable name. The name will be reassigned to the next value on the next iteration, but will be absent up to the end of the code block after the del item statement. No operator even tries to delete from the list_1, and the list remains unaffected.

There are 2 possible ways to fix this:

1. Either you meant del list_1[idx] in the example, which removes the indexed item from the list. And the output will be [2, 4] for the same reason as with list_4.pop(idx).
2. Or the explanation is wrong, and should not refer to item deletion, but should refer to the variable name un-assignment.

Just for historic reference, this is how the example looks now:

list_1 = [1, 2, 3, 4]
for idx, item in enumerate(list_1):
    del item

>>> list_1
[1, 2, 3, 4]

* del removes a specific index (That's why first list_1 was unaffected), raises IndexError if an invalid index is specified.

[satwikkansal]

Ah, right, my only intention to add del was to show the abuse of the del keyword. I'll fix the explanation.

[satwikkansal]

@nolar Thanks for reporting the issue! I've fixed this in 7e93e0c, feel free to reopen the issue if the explanation seems insufficient or incorrect 👍