i_do_not_agree

Perhaps s/he was looking at Lisp/Scheme:

  (define (foo x)
    (if (bar x)
      1
      #f))

The returned value is the value of the last expression. No need for an else, or a return keyword.

This is horrible. It looks like ":=" is a comparison operator. The last line is dangerously close to Erlang list comprehensions:

[ {X, Y, X/Y} || X <- Some_Function (), Y <- Some_Other_Function () ]

And people bitch about Erlang syntax.

Edit: "/" is the division operator

Just need something like blocks in Smalltalk. Wikipedia page on list comprehensions says Smalltalk-80 had list comprehensions and that was ~ 40 years ago.

Smalltalk also uses ":=" for assignment and "=" for comparison. In Pharo, VA and Dolphin at least does what this Python proposal does - return the value of the last expression.