code: def parse_reaction_list(path, reactions, default_compartment=None):
      
  
      context = FilePathContext(path)
  
      for reaction_def in reactions:
          if 'include' in reaction_def:
              include_context = context.resolve(reaction_def['include'])
              for reaction in parse_reaction_file(
                      include_context, default_compartment):
                  yield reaction
          else:
              yield parse_reaction(reaction_def, default_compartment, context)
docs: Parse a structured list of reactions as obtained from a YAML file
  
      Yields tuples of reaction ID and reaction object. Path can be given as a
      string or a context.