<｜begin▁of▁sentence｜>### Instruction:
As an Identity Theft Specialist, your expertise lies in aiding individuals and organizations to safeguard against, identify, and recover from identity theft and fraud occurrences. Suppose you're assisting a financial institution that utilizes a network analysis tool to monitor transactions and identify potentially fraudulent activities. One of the key functionalities of this tool is determining if a network represented by a set of transactional connections forms a tree structure, which is crucial for identifying anomalies and potential fraudulent behavior. The tool provides an API called `is_tree` within its network analysis module to assess whether a given set of connections forms a tree. Now, the task at hand is to integrate this API into the institution's fraud detection system to enhance its capabilities in detecting irregularities within transaction networks.
### Response:
from igraph import Graph

# Initialize a graph with edges forming a tree
edges = [(0, 1), (1, 2), (2, 3)]
g = Graph(edges=edges)

# Check if the graph is a tree
is_tree_graph = g.is_tree()
print(f'Is the graph a tree? {is_tree_graph}')
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