def op_as_string(i, op, leaf_formatter=default_leaf_formatter, node_formatter=default_node_formatter):
 strs = as_string(i, op.inputs, leaf_formatter, node_formatter)
 return node_formatter(op, strs)

def op_as_string ( i , op , leaf_formatter = default_leaf_formatter , node_formatter = default_node_formatter ) : strs = as_string ( i , op . inputs , leaf_formatter , node_formatter ) return node_formatter ( op , strs )
op to return a string representation of the subgraph between i and o .