code: def __init__(self, verbose, indent=0, lines=None):
      self.verbose = verbose
      self.indent = indent
  
      if not lines:
          lines = []
      self.lines = lines
  
imports: from nltk.inference.api import BaseProverCommand, Prover
  from nltk.internals import Counter
  from nltk.sem.logic import AbstractVariableExpression, AllExpression, AndExpression, ApplicationExpression, EqualityExpression, ExistsExpression, Expression, FunctionVariableExpression, IffExpression, ImpExpression, LambdaExpression, NegatedExpression, OrExpression, Variable, VariableExpression, unique_variable
label_desc: Use image node_id 1 to create a new Debug object  with example: obj = Debug(verbose, indent, lines)