In <> writes:

> A=["1","2","3"]
> print(list(map(float,A)).insert(0,1))

> I want to insert 1 at the head of the list but this gives me a surprise

insert() does not return anything; it modifies the existing list in-place.

John Gordon                   A is for Amy, who fell down the stairs              B is for Basil, assaulted by bears
                                -- Edward Gorey, "The Gashlycrumb Tinies"


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