Update base_graph.py

Author: VinciGit00

scrapegraphai/graphs/base_graph.py

@@ -2,6 +2,7 @@
 Module for creating the base graphs
  """
 import time
+import warnings
 from langchain_community.callbacks import get_openai_callback
 
 
@@ -26,12 +27,19 @@ class BaseGraph:
         entry_point (BaseNode): The node instance that represents the entry point of the graph.
     """
 
-    def __init__(self, nodes: list, edges: list):
+    def __init__(self, nodes: list, edges: dict, entry_point: str):
         """
         Initializes the graph with nodes, edges, and the entry point.
         """
-        self.nodes = nodes
+
+        self.nodes = {node.node_name: node for node in nodes}
         self.edges = self._create_edges(edges)
+        self.entry_point = entry_point.node_name
+
+        if nodes[0].node_name != entry_point.node_name:
+            # raise a warning if the entry point is not the first node in the list
+            warnings.warn(
+                "Careful! The entry point node is different from the first node if the graph.")
 
     def _create_edges(self, edges: list) -> dict:
         """