class_docstr: A container for the nodes and labelled edges of a dependency structure.
docstr: Returns true if the graph contains a node with the given node
  address, false otherwise.
docstr_tok: ["Returns","true","if","the","graph","contains","a","node","with","the","given","node","address",",","false","otherwise","."]
code: def contains_address(self, node_address):
      """
      Returns true if the graph contains a node with the given node
      address, false otherwise.
      """
      return node_address in self.nodes
  
imports: import subprocess
  import warnings
  from collections import defaultdict
  from itertools import chain
  from pprint import pformat
  from nltk.internals import find_binary
  from nltk.tree import Tree
label_desc: Use image node_id 7 for calling the DependencyGraph obj's underlying member method code with example usage: obj.contains_address(node_address) and returns: unknown