docstr: Yield the nodes in the subtree rooted at a node p.
docstr_tok: ["Yield","the","nodes","in","the","subtree","rooted","at","a","node","p","."]
code: def trace_subtree(self, p):
      """
      Yield the nodes in the subtree rooted at a node p.
      """
      yield p
      l = self.last_descendent_dft[p]
      while p != l:
          p = self.next_node_dft[p]
          yield p
  
imports: from itertools import chain, islice, repeat
  from math import ceil, sqrt
  import networkx
  from networkx.utils import not_implemented_for
label_desc: Use image node_id 7 for calling the _DataEssentialsAndFunctions obj's underlying member method code with example usage: obj.trace_subtree(p) without return types