Python is approximately as old as Python and most likely got
indentation from ABC.
Checking on Wikipedia, one of the ABC's creators was Lambert Meertens
(famous for *-morphisms amongst other things) so there is a lineage
going back to Algol and Peter Landin / ISWIM.
PS. my fact-checking is a bit ropey, but I think my general point
stands that the current popular languages haven't taken much if
anything from Haskell, rather its predecessors in the functional
family.
On 4 November 2010 11:09, Heinrich Apfelmus
As far as I am informed, Python got the significant whitespace from Haskell. Haskell itself (or rather the design committee) got the idea from SASL (1976) and Miranda (1986), though it goes way back to the 1960s, as described in section 4.1 "Layout" of