[Python-ideas] Dart-like method cascading operator in Python

[Stephen J. Turnbull]

Perešíni Peter writes:

 > Anything which is tree-like (e.g. mentioned DSLs, API wrappers
 > around complicated objects (e.g. xml), configurations, gnuplot
 > example, ...) can be difficult to instantiate using normal syntax:

 > tree = Tree()
 >   ..newChild(value=5)
 >       ..newChild(value=3)
 >       ..newChild()
 >   ..newChild(color="green")

This particular application just screams for positional parameters,
though:

    tree = Tree(
                Node(
                     Node(value=3),
                     Node(),
                     value=5),
                Node(color="green"))

(YMMV about positioning of the parens, to me this is the one that says
"TREE!! and here are the Nodes" most clearly.)