human
Complete this python program:
def deprecated(filename, msg=''):
assistant
#Here is the Python program you requested.

    """Decorator which will print a warning message on the first call.
    Use it like this::
    @deprecated(\myfile\, \do something different...\)
    def fn_name(...)
    And it will print::
    WARNING myfile.fn_name deprecated. do something different...
    """
    def _deprecated(f):
        printme = [True]
        def g(*args, **kwargs):
            if printme[0]:
                print(('WARNING:    %s.%s    deprecated.    %s' % (filename, f.__name__, msg)))
                printme[0] = False
            return f(*args, **kwargs)
        return g
    return _deprecated