"""import inspect
>>>x=2
>>>fmt("{0} {x} {y}", 1, y=3)
'1 2 3'
"""
def fmt(s, *args, **kwargs):
	c_frame = inspect.getouterframes(inspect.currentframe(), 1)[1][0]
	c_args, c_varargs, c_varkw, c_locals = inspect.getargvalues(c_frame)
	d = dict(c_locals)
	d.update(globals())
	if kwargs: d.update(kwargs)
	return s.format(*args, **d)