<｜begin▁of▁sentence｜>### Instruction:
If I have a directed graph with edges (0, 1), (1, 2), (2, 3), (3, 4), how can the degree_mixing_dict function be used to get a dictionary representation of the degree mixing matrix based on the 'out' degree of the source node and the 'in' degree of the target node?
### Response:
import networkx as nx

# Create a directed graph
G = nx.DiGraph()
G.add_edges_from([(0, 1), (1, 2), (2, 3), (3, 4)])

# Use the degree_mixing_dict API to get degree mixing dictionary
mixing_dict = nx.degree_mixing_dict(G, x='out', y='in')
print(mixing_dict)
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