Tim Peters <[email protected]> added the comment:
What, exactly, in the output shows "the problem"? When I run it, the `a == b`
part is always True, while `len(x)` and `len(crazyQuilt2)` are always 30. The
other three (len(coordinates), len(x2), len(x3)) are always equal to each
other, but are monotonically non-increasing across output lines. For example,
a typical block of output lines:
(True, 30, 30, 30, 30, 30)
(True, 30, 30, 30, 30, 30)
(True, 30, 30, 30, 30, 30)
(True, 30, 30, 30, 30, 30)
(True, 19, 30, 30, 19, 19)
(True, 19, 30, 30, 19, 19)
(True, 19, 30, 30, 19, 19)
(True, 12, 30, 30, 12, 12)
(True, 12, 30, 30, 12, 12)
(True, 12, 30, 30, 12, 12)
None of that surprises me. Exactly what about it surprises you? Or do you get
different kinds of output (and, if so, exactly what?)?
Here's my guess: you _intended_ these two lines:
crazyQuilt2[coordinate2Index] = crazyQuilt2[index]
crazyQuilt2[index] = crazyQuilt2[coordinate2Index]
to _swap_ the values at indices `index` and `coordinate2Index`. But they
don't. They copy the value originally at `index` into the `coordinate2Index`
position, and leave the value originally at `index` untouched.
As more copies randomly build up, anything that builds a set or dict out of the
list naturally gets smaller.
----------
nosy: +tim.peters -zach.ware
resolution: not a bug ->
stage: resolved ->
status: closed -> open
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Python tracker <[email protected]>
<https://bugs.python.org/issue39338>
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