class_docstr: A stream operator that computes the forward fill imputation of a stream.
class_docstr_tok: ["A","stream","operator","that","computes","the","forward","fill","imputation","of","a","stream","."]
code: def forward(self) -> T:
      node = self.inputs[0]
      if not self.previous or np.isfinite(node.value):
          self.previous = node.value
      return self.previous
  
file_path: tensortrade/tensortrade/feed/api/generic/imputation.py
imports: import numpy
  from tensortrade.feed.core.base import Stream, T
label_desc: Use image node_id 2 for calling the ForwardFill obj's underlying member method code with example usage: obj.forward() and returns: self