how to initialize list comprehension

Asked Jun 20 '23 at 11:35

Active Jun 20 '23 at 11:35

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I was using list comprehension in Python. But my program behaves differently based on the way how I initialize the variable

Works as expected if am using below piece of code temp = [[-1 for y in range(k + 1)] for x in range(n + 1)]
It behaves strange if am using below code temp = [[-1]*(k+1)]*(n + 1)

what is the difference between both the ways of initializing the variable

asked Jun 20 '23 at 11:35

Naveen Pragathesh

3

Only one of those is a listcomp. The other is just a multiplied literal. – 2e0byo Jun 20 '23 at 11:37
The outputs are the same. What kind of "different behaviour" do you see? – doneforaiur Jun 20 '23 at 11:39
2

The outputs are not the same since the same list reference is repeated n+1 times in example 2. – Mateen Ulhaq Jun 20 '23 at 11:40

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