Yet another string interpolation function...

[MonkeeSage]

There are several string interpolation functions, as well as
string.Template. But here's yet another. This one emulates ruby's
inline interpolation syntax (using #{}), which interpolates strings as
well as expressions. NB. It uses eval(), so only use it in trusted
contexts!

import sys, re
def interp(string):
  locals  = sys._getframe(1).f_locals
  globals = sys._getframe(1).f_globals
  for item in re.findall(r'#\{([^{]*)\}', string):
    string = string.replace('#{%s}' % item,
                            str(eval(item, globals, locals)))
  return string

test1 = 'example'
def tryit():
  test2 = 1
  # variable interpolation
  print interp('This is an #{test1} (and another #{test1}) and an int
(#{test2})')
  # expression interpolation
  print interp('This is an #{test1 + " (and another " + test1 + ")"}
and an int (#{test2})')
tryit()

Recipe:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/502257

Ok, now tell me all the things wrong with it! ;)

Regards,
Jordan