class_docstr: Collection of _Hypothesis objects
class_docstr_tok: ["Collection","of","_Hypothesis","objects"]
docstr: :return: Hypothesis with the highest score in the stack
  :rtype: _Hypothesis
docstr_tok: [":","return",":","Hypothesis","with","the","highest","score","in","the","stack",":","rtype",":","_Hypothesis"]
code: def best(self):
      """
      :return: Hypothesis with the highest score in the stack
      :rtype: _Hypothesis
      """
      if self.items:
          return self.items[0]
      return None
  
imports: import warnings
  from collections import defaultdict
  from math import log
label_desc: Use image node_id 4 for calling the _Stack obj's underlying member method code with example usage: obj.best() and returns: None, self