Trying below simple code with list.
a = []
a.append(a)
print(a)
Getting below output.
[[...]]
Why are the three dots inside?
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3
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6You've created a loop where `a[0] = a` so the `...` is representing the infinite depth of the list. – Loocid Aug 19 '20 at 01:13
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2Why were you expecting it to not change? Maybe you meant `a.extend(a)`? – wjandrea Aug 19 '20 at 02:19