<｜begin▁of▁sentence｜>### Instruction:
As a gene therapist, I understand that you may need to analyze network structures for genetic interactions. Imagine you are working on a gene therapy treatment for a rare genetic disorder affecting a population of 500 individuals. With a probability of genetic interaction set at 0.25, you have modeled the genetic network using the erdos_renyi_graph in networkx. Now, you want to use the DepthFirstSearchSampler to extract a subgraph containing 50 genes and then calculate the PageRank of the genes within the network. Can you help me with this?
### Response:
import networkx as nx
from littleballoffur import DepthFirstSearchSampler

G = nx.erdos_renyi_graph(n=500, p=0.25)
sampler = DepthFirstSearchSampler(50)
sampler_G = sampler.sample(G)
result = nx.pagerank(sampler_G)
print(result)
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