<｜begin▁of▁sentence｜>### Instruction:
Imagine we're in a courtroom, and the case at hand involves navigating through a sequence of court proceedings, akin to traversing a series of connected courtrooms in a single file line, where courtroom 0 is where we begin. The judge is interested in the official record tracing back who was the last to interact with courtroom 0 as we progress through the sequence. This 'chain of custody' for court interactions is akin to constructing a dictionary of predecessors in a legal labyrinth. 

Now, envision that during the investigation, we only wish to delve a maximum of two courtrooms deep from our starting point. For the court record, could you account for this limitation in your investigation and provide the adjusted 'chain of custody' detailing how this limited search would alter our understanding of the sequence of interactions with courtroom 0? 

Please ensure this inquiry into the courtroom sequence and how far the investigation should extend while maintaining judicial accuracy is reflected in the legal documentation, with the specifics tailored to maintain the integrity of the scenario.
### Response:
import networkx as nx

# Create a path graph with 4 nodes
G = nx.path_graph(4)

# Get the predecessors in DFS from source node 0
predecessors = nx.dfs_predecessors(G, source=0)

# Print the predecessors
print(predecessors)

# Limiting the depth of search to 2
limited_predecessors = nx.dfs_predecessors(G, source=0, depth_limit=2)

# Print the limited depth predecessors
print(limited_predecessors)
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