I have some code that does an awful lot of string formatting, Often, I end up with code along the lines of:

"...".format(x=x, y=y, z=z, foo=foo, ...)

Where I'm trying to interpolate a large number of variables into a large string.

Is there a good reason not to write a function like this that uses the inspect module to find variables to interpolate?

import inspect

def interpolate(s):
    return s.format(**inspect.currentframe().f_back.f_locals)

def generateTheString(x):
    y = foo(x)
    z = x + y
    # more calculations go here
    return interpolate("{x}, {y}, {z}")