def __init__(self, params_dict=None):

        self.model = Model('model', _export=False)
        """The PySB model to which components are added."""
        self.estimate_params = []
        """A list of the parameters to be estimated."""
        self.params_dict = params_dict
        """A dict of parameter values to override default values."""
        self.priors = []
        """A list of priors for use in sampling parameter values."""

    # -- CONSTRUCTOR WRAPPER FUNCTIONS ---------------------------------------
The Node class must be subclassed, it doesn't work by itself
dataset/ETHPy150Open pysb/pysb/pysb/builder.py/Builder.__init__--crossover with--dataset/ETHPy150Open akaihola/lusmu/lusmu/tests/test_core.py/NodeTestCase.test_missing_evaluate