<｜begin▁of▁sentence｜>### Instruction:
Imagine yourself in an experimental performance art space, where the artist's canvas is a conceptual network, an abstract representation of relationships and connections. This work of art is currently centered around the theme of dualities and pairings. The artist has curated a series of unique elements divided into two distinct groups, one bathed in ethereal blue and the other in a vibrant crimson hue.

In the sapphire collection, we have the entities named 'A', 'B', 'C', and 'D', whereas the crimson group is graced by the numerals 1, 2, 3, and 4. Each member from the world of blues forms a connection with a counterpart in the realm of reds, symbolizing a dance of union and collaboration.

The connections are as mystic as the stars in a constellation:

- 'A' reaches out to 1, creating a bridge across worlds.
- 'B' mingles with 2, forming a bond that defies dimensions.
- 'C', in an act of cosmic balance, allies with 3.
- 'D' unites with 4, completing a circuit of harmony.

But the interplay of relationships does not end there—additional connections transmute this network into a complex masterpiece:

- 'A' also bestows its presence upon 2.
- 'B' extends its energy towards 3.
- 'C', ever flowing, meets 4.
- 'D', in a twist of fate, circles back to 1.

The artist now invites us to ponder upon the concept of 'extendability' within this visual metaphor—a measure of potential, growth, and evolution of this networked entity. How can this bipartite graph, a physical embodiment of relationships and interdependencies, expand or transform within its defined parameters while maintaining its core essence of connection?

The challenge lies before us, without digital tools or prescriptive guidelines—merely the power of human contemplation and the spirits of inquiry and exploration that guide the hands of every true artist. How would you interpret the extendability of this interconnected tapestry, transcending its current form, without altering the fundamental bipartite nature of its existence?
### Response:
import networkx as nx
from networkx.algorithms.bipartite.matching import maximal_extendability

# Create a bipartite graph with a perfect matching
B = nx.Graph()
B.add_nodes_from(['A', 'B', 'C', 'D'], bipartite=0)
B.add_nodes_from([1, 2, 3, 4], bipartite=1)
B.add_edges_from([('A', 1), ('B', 2), ('C', 3), ('D', 4),
                ('A', 2), ('B', 3), ('C', 4), ('D', 1)])

# Compute the extendability of the graph
extendability = maximal_extendability(B)
print('Extendability:', extendability)
<|EOT|>
