docstr: Initialize Model
docstr_tok: ["Initialize","Model"]
code: def __init__(self):
      """
      Initialize Model
      """
      self.metric = "mse"
      self.model = None
      self.model_init = False
  
file_path: BigDL/python/chronos/src/bigdl/chronos/model/prophet.py
imports: import json
  import numpy
  from prophet import Prophet
  from prophet.serialize import model_to_json, model_from_json
  from prophet.diagnostics import performance_metrics
  from prophet.diagnostics import cross_validation
  from bigdl.chronos.metric.forecast_metrics import Evaluator
label_desc: Use image node_id 1 to create a new ProphetModel object  with example: obj = ProphetModel()