human
Complete the below
def _replace_by(module_function, package=__package__, warn=False):

    ''''Try replace decorated function by module.function.'
    '''
 ... What is a the Python program you requested?
assistant
#Here is the Python program you requested.
    try:
        from importlib import import_module
    except ImportError:
        warnings.warn('could    not    import    module    importlib')
        return (lambda func: func)
    def decorate(func, module_function=module_function, warn=warn):
        try:
            (module, function) = module_function.split('.')
            if package:
                module = import_module(('.' + module), package=package)
            else:
                module = import_module(module)
            (func, oldfunc) = (getattr(module, function), func)
            globals()[('__old_' + func.__name__)] = oldfunc
        except Exception:
            if warn:
                warnings.warn(('failed    to    import    %s' % module_function))
        return func
    return decorate