Python optimizes memory usage by reusing small integer objects (typically -5 to 256) instead of creating new objects each time, which explains why identity comparisons (is) behave differently for small versus large integers.
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Why Python Reuses Small Integers追加:
Python's secretly reuses some integers, but not others. Small numbers like five all point to the same object, but larger numbers like 5,000 create new objects every time. It's just an optimization, and it explains weird identity behavior.
More under the hood details in the full video.
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