<｜begin▁of▁sentence｜>### Instruction:
Imagine you are conducting an ethnographic study on a linear, indigenous society composed of five distinct familial groups, each represented as a node: 0, 1, 2, 3, and 4. These groups form a lineage where each is only directly connected to its immediate neighbors, creating a straightforward social hierarchy.

To map out the intricate network of social dynamics, you decide to traverse this lineage in a manner akin to a depth-first search, starting from the progenitor family, node 0. Could you conceptualize a sequence reflecting the order of visitation of these family groups starting from the founding node, adhering strictly to the depth-first methodology?

Additionally, to gain a focused understanding of the closest kinship relations, you would like to limit your depth of investigation to include just two generations descending from the progenitor family. Could you theorize a second sequence that represents your exploration of these familial ties under the constraint of this generational depth limit?
### Response:
import networkx as nx

# Create a graph
G = nx.path_graph(5)

# Generate nodes in DFS pre-order starting from source node 0
preorder_nodes = list(nx.dfs_preorder_nodes(G, source=0))

# Output: [0, 1, 2, 3, 4]
print(preorder_nodes)

# Generate nodes in DFS pre-order with a depth limit of 2 starting from source node 0
preorder_nodes_limited = list(nx.dfs_preorder_nodes(G, source=0, depth_limit=2))

# Output: [0, 1, 2]
print(preorder_nodes_limited)
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