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from swarms.structs.base import BaseStructure
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class GraphWorkflow(BaseStructure):
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"""
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Represents a graph-based workflow structure.
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Attributes:
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graph (dict): A dictionary representing the nodes and edges of the graph.
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entry_point (str): The name of the entry point node in the graph.
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Methods:
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add(node, node_value): Adds a node to the graph with the specified value.
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start(node_name): Sets the starting node for the workflow.
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connect(from_node, to_node): Connects two nodes in the graph.
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set_entry_point(node_name): Sets the entry point node for the workflow.
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add_edge(from_node, to_node): Adds an edge between two nodes in the graph.
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add_conditional_edges(from_node, condition, edge_dict): Adds conditional edges from a node to multiple nodes based on a condition.
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run(): Runs the workflow and returns the graph.
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"""
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def __init__(self):
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self.graph = {}
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self.entry_point = None
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def add(self, node, node_value):
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self.graph[node] = {"value": node_value, "edges": {}}
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def start(self, node_name):
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self._check_node_exists(node_name)
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def connect(self, from_node, to_node):
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self._check_node_exists(from_node, to_node)
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def set_entry_point(self, node_name):
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if node_name is self.graph:
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self.entry_point = node_name
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else:
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raise ValueError("Node does not exist in graph")
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def add_edge(self, from_node, to_node):
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if from_node in self.graph and to_node in self.graph:
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self.graph[from_node]["edges"][to_node] = "edge"
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else:
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raise ValueError("Node does not exist in graph")
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def add_conditional_edges(self, from_node, condition, edge_dict):
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if from_node in self.graph:
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for condition_value, to_node in edge_dict.items():
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if to_node in self.graph:
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self.graph[from_node]["edges"][
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to_node
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] = condition
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else:
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raise ValueError("Node does not exist in graph")
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else:
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raise ValueError(
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f"Node {from_node} does not exist in graph"
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)
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def run(self):
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if self.entry_point is None:
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raise ValueError("Entry point not set")
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return self.graph
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def _check_node_exists(self, node_name):
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if node_name not in self.graph:
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raise ValueError(
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f"Node {node_name} does not exist in graph"
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)
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def _check_nodes_exist(self, from_node, to_node):
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self._check_node_exists(from_node)
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self._check_node_exists(to_node)
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