code: def init(self, state, initial):
      self.t = 0
      state["z"] = pyro.sample(
          "z_init", dist.Delta(initial, event_dim=1)
      )
  
file_path: pyro/examples/smcfilter.py
imports: import argparse
  import logging
  import torch
  import pyro
  import pyro.distributions
  from pyro.infer import SMCFilter
label_desc: Use image node_id 2 for calling the SimpleHarmonicModel obj's underlying member method code with example usage: obj.init(state, initial) without return types