Why does the V1 list change? Why is it "linked"?

Asked Dec 16 '21 at 18:38

Active Dec 16 '21 at 18:42

Viewed 22 times

V0 = [0]
V1 = V0

V0[0] = 2

print(f"V0: {V0}")
print(f"V1: {V1}")

edited Dec 16 '21 at 18:42

MattDMo

asked Dec 16 '21 at 18:38

Demian Marín

1

V0 and V1 hold the same reference to the value. – Dec 16 '21 at 18:40
Python uses references, if you'd like a copy of V0, use `copy()` – mdf Dec 16 '21 at 18:42
Right. There is only one list in your program. That list happens to be bound to two names. This is one of the classic Python blunders. https://github.com/timrprobocom/documents/blob/main/UnderstandingPythonObjects.md – Tim Roberts Dec 16 '21 at 18:44

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