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pygarn PyPI version Tests Python 3.8 Python 3.9 Python 3.10

Forward- and backward operations on graphs with a lot of fuzzyness.

Example of a forward and backward operation on a graph.

Install via

  • pip: pip install pygarn
  • poetry: poetry add pygarn
  • or add in your conda environment:
name: sur-your-env-name
- defaults
- python>=3.8
- pip
- pip:
  - pygarn



import networkx as nx
from pygarn.base import RandomVertexSelector
from pygarn.growth import AddCompleteGraph

n_vertices_initial = 20
g_initial = nx.erdos_renyi_graph(n_vertices_initial, 0.3)

op_add_kcomplete = AddCompleteGraph(
    sources=RandomVertexSelector(min=1, max=3),
    targets=RandomVertexSelector(min=1, max=3),

g_new = op_add_kcomplete.forward(g_initial)

g_orig = op_add_kcomplete.backward(g_new)

# Should be highly likely:
assert nx.is_isomorphic(g_orig, g_initial)
import networkx as nx
from pygarn.base import VertexDegreeSelector
from pygarn.growth import AddVertex

n_vertices_initial = 20
g_initial = nx.erdos_renyi_graph(n_vertices_initial, 0.3)
n_edges_initial = len(g_initial.edges)
degrees_initial = [(v, d) for v, d in]

selector = VertexDegreeSelector()
op_add = AddVertex()
n_rounds = 5

g_current = g_initial.copy()
for _ in range(n_rounds):
    g_current = op_add.forward(g_current)

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