code: def get_conflicting_tools(self, request_only=False):
          
          from collections import defaultdict
  
          tool_sets = defaultdict(set)
          tools_dict = self.get_tools(request_only=request_only)
          for variant, tools in tools_dict.itervalues():
              for tool in tools:
                  tool_sets[tool].add(variant)
  
          conflicts = dict((k, v) for k, v in tool_sets.iteritems() if len(v) > 1)
          return conflicts
docs: Returns tools of the same name provided by more than one package.
  
          Args:
              request_only: If True, only return the key from resolved packages
                  that were also present in the request.
  
          Returns:
              Dict of {tool-name: set([Variant])}.