refactoring of engine

examples/openai/custom_graph_openai.py

@@ -62,20 +62,19 @@ generate_answer_node = GenerateAnswerNode(
 # ************************************************
 
 graph = BaseGraph(
-    nodes={
+    nodes=[
         robot_node,
         fetch_node,
         parse_node,
         rag_node,
         generate_answer_node,
-    },
+    ],
     edges={
         (robot_node, fetch_node),
         (fetch_node, parse_node),
         (parse_node, rag_node),
         (rag_node, generate_answer_node)
     },
-    entry_point=robot_node
 )
 
 # ************************************************

scrapegraphai/graphs/base_graph.py

@@ -26,15 +26,14 @@ class BaseGraph:
         entry_point (BaseNode): The node instance that represents the entry point of the graph.
     """
 
-    def __init__(self, nodes: dict, edges: dict, entry_point: str):
+    def __init__(self, nodes: list, edges: list):
         """
         Initializes the graph with nodes, edges, and the entry point.
         """
-        self.nodes = {node.node_name: node for node in nodes}
+        self.nodes = nodes
         self.edges = self._create_edges(edges)
-        self.entry_point = entry_point.node_name
 
-    def _create_edges(self, edges: dict) -> dict:
+    def _create_edges(self, edges: list) -> dict:
         """
         Helper method to create a dictionary of edges from the given iterable of tuples.
 
@@ -61,7 +60,7 @@ class BaseGraph:
         Returns:
             dict: The state after execution has completed, which may have been altered by the nodes.
         """
-        current_node_name = self.entry_point
+        current_node_name = self.nodes[0]
         state = initial_state
 
         # variables for tracking execution info
@@ -75,10 +74,10 @@ class BaseGraph:
             "total_cost_USD": 0.0,
         }
 
-        while current_node_name is not None:
+        for index in self.nodes:
 
             curr_time = time.time()
-            current_node = self.nodes[current_node_name]
+            current_node = index
 
             with get_openai_callback() as cb:
                 result = current_node.execute(state)

scrapegraphai/graphs/smart_scraper_graph.py

@@ -10,6 +10,7 @@ from ..nodes import (
 )
 from .abstract_graph import AbstractGraph
 
+
 class SmartScraperGraph(AbstractGraph):
     """
     SmartScraper is a comprehensive web scraping tool that automates the process of extracting
@@ -52,25 +53,24 @@ class SmartScraperGraph(AbstractGraph):
         )
 
         return BaseGraph(
-            nodes={
+            nodes=[
                 fetch_node,
                 parse_node,
                 rag_node,
                 generate_answer_node,
-            },
+            ],
             edges={
                 (fetch_node, parse_node),
                 (parse_node, rag_node),
                 (rag_node, generate_answer_node)
-            },
-            entry_point=fetch_node
+            }
         )
 
     def run(self) -> str:
         """
         Executes the web scraping process and returns the answer to the prompt.
         """
-        inputs = {"user_prompt": self.prompt, self.input_key: self.source}  
+        inputs = {"user_prompt": self.prompt, self.input_key: self.source}
         self.final_state, self.execution_info = self.graph.execute(inputs)
 
         return self.final_state.get("answer", "No answer found.")