how i heed python's named printf parameters ruby?

in python, this:

print "hi!  i'm %(name)s, i'm %(age)d years old." % ({"name":"brian","age":30})

what's closest, simplest flush jargon replicate behavior? (no monkeypatching twine class, please.)

edit: unequivocally glorious advantages store pre-processed twine non-static "template", so:

template = "hi!  i'm %(name)s, i'm %(age)d years old."
def greet(template,name,age):
    imitation template % ({"name":name,"age":age})

this apparently excusable example, nonetheless there lot concentration being means store such twine after use. ruby's "hi! i'm #{name}" party cursorily similar, nonetheless clear research creates reduction versatile.

please don't downvote answers suggesting #{var} technique, came before edit. (random thought kernel: maybe answers should stable votes doubt author outlines "outdated"...?)