<｜begin▁of▁sentence｜>### Instruction:
Imagine we're analyzing the workflow in an aircraft's maintenance system, represented by a series of tasks that must be completed in a sequential manner to ensure the aircraft's airworthiness. The tasks can be seen as a series of interconnected components, akin to a directed graph, where each task is a node, and the progression from one task to another is depicted as directed edges connecting these nodes.

In our particular maintenance routine, the progression is outlined as follows: starting from the initial inspection task (node 0), we proceed to the engine check (node 1), then to the avionics system evaluation (node 2), followed by the landing gear examination (node 3), and finally looping back to the initial inspection point (node 0) to ensure a comprehensive maintenance cycle.

Could you initiate a systematic, edge-focused inspection sequence within this directed task graph, starting from the initial inspection task, akin to a depth-first search protocol as used in structural integrity assessments software, such as NetworkX? This would effectively simulate the meticulous scrutiny an aircraft mechanic would adhere to when following the necessary procedures to maintain the high safety standards of the aircraft's systems.
### Response:
import networkx as nx

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

# Add edges to the graph
G.add_edges_from([(0, 1), (1, 2), (2, 3), (3, 0)])

# Perform a directed depth-first search of edges
edges_dfs = list(nx.edge_dfs(G, source=0))

print('Directed DFS starting from node 0:', edges_dfs)
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