Graph Operator

GraphLearn provides two Python interfaces, which we name “Graph Operator” and “GSL (Graph Sampling Language)”.

Graph operator is the immediate execution of an arithmetic on a GraphLearn graph, specifying the input to the arithmetic and waiting for the output of the arithmetic. GSL is a graph query language. A Query string together the input and output of multiple operators to form a directed acyclic data stream. An operator of a Query is derived from the traversal of a vertex or edge in the graph, and the Query can be executed repeatedly until the complete graph is traversed, producing a sequence of outputs.

• How do I choose a Python interface?

  If you need to traverse a graph, we recommend using GSL, which is backed by an efficient computational graph execution engine that helps you concurrently execute Query repeatedly. </br

  If using GraphLearn’s model interface, use GSL.
  If the input to the operator does not come from the graph, it is recommended to use the graph operator, and GSL’s Query only supports traversal from the graph as input.
  

This chapter describes the graph operator. To use GSL, please read the chapter on GSL.

Note: The graph operator must be called after g.init().