[Python-ideas] Customizing format()

[Carl Johnson]

I haven't entirely been following this conversation, so I may be
missing something, but what about something like:

"Balance = ${balance:{minilang}}".format(balance=1.00,
minilang=mini_formatter(thousands_sep=",", ...))

That way, even if the mini-language gets really confusing we'll have
an easy to call function that manages it. I always thought it was
weird that things co