class Frame(object):

def __init__(self, frame):

    self.code = py.code.Code(frame.f_code)

    self.lineno = frame.f_lineno - 1

    self.f_globals = frame.f_globals

    self.f_locals = frame.f_locals

    self.raw = frame

def eval(self, code, **vars):

    """ evaluate 'code' in the frame

            'vars' are optional additional local variables

            returns the result of the evaluation

        """

    f_locals = self.f_locals.copy() 

    f_locals.update(vars)

    return eval(code, self.f_globals, f_locals)

def exec_(self, code, **vars):

    """ exec 'code' in the frame

            'vars' are optiona; additional local variables

        """

    f_locals = self.f_locals.copy() 

    f_locals.update(vars)

    exec code in self.f_globals, f_locals 

def getargs(self):

    """ return a list of tuples (name, value) for all arguments

        """

    retval = []

    for arg in self.code.getargs():

        retval.append((arg, self.f_locals[arg]))

    return retval

def is_true(self, object):

    return object

def repr(self, object):

    """ return a 'safe' (non-recursive, one-line) string repr for 'object'

        """

    return py.__.code.safe_repr._repr(object)