Untitled

import networkx as nx
import matplotlib.pyplot as plt

# Define the data
data = [
    ('a', 'b', 0.2),
    ('b', 'e', 0.2),
    ('c', 'd', 0.8),
    ('d', 'f', 0.6),
    ('e', 'f', 0.3),
    ('f', 'g', 1),
    ('g', 'h', 0.4),
    ('h', 'end', 0.3)
]

# Create a directed graph
G = nx.DiGraph()

# Add nodes and edges with weights
for task1, task2, time in data:
    G.add_edge(task1, task2, weight=time)

# Plot the graph
pos = nx.spring_layout(G)  # positions for all nodes
nx.draw(G, pos, with_labels=True, node_size=1500, node_color="skyblue", font_size=12, font_weight="bold", arrowsize=20)
edge_labels = nx.get_edge_attributes(G, 'weight')
nx.draw_networkx_edge_labels(G, pos, edge_labels=edge_labels)

plt.title("Precedence Diagram")
plt.show()