code: def p(self, u, v):
      # degree probability
      return 1 - self.degree[u] * self.degree[v] / (4.0 * self.m)
  
imports: import heapq
  import math
  from itertools import chain, combinations, zip_longest
  from operator import itemgetter
  import networkx
  from networkx.utils import py_random_state, random_weighted_sample
label_desc: Use image node_id 4 for calling the DegreeSequenceRandomGraph obj's underlying member method code with example usage: obj.p(u, v) and returns: unknown