# first: works fine x = [1, 2, 4, 2, 1, 3] x = list(set(x)) x.sort() print(x) # output: 1, 2, 3, 4
# second: why x became None ?? x = [1, 2, 4, 2, 1, 3] x = list(set(x)).sort() print(x) # output: None I know that sort() returns None, but I guess that it would be returned x that was sorted. Why so?
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