class_docstr: A Block serves as the foundation class for all graph-based optimization techniques.
class_docstr_tok: ["A","Block","serves","as","the","foundation","class","for","all","graph-based","optimization","techniques","."]
docstr: Number of input arguments.
docstr_tok: ["Number","of","input","arguments","."]
code: def n_input(self) -> int:
      """Number of input arguments."""
  
      return self._n_input
  
imports: import opytimizer.utils.exception
label_desc: Use image node_id 7 for calling the Block obj's underlying member method code with example usage: obj.n_input() and returns: self