code: def set_all_variables(self, delu_dict, delu_default):
          
  
          # Set up the variables
          all_delu_dict = {}
          for du in self.list_of_chempots:
              if delu_dict and du in delu_dict.keys():
                  all_delu_dict[du] = delu_dict[du]
              elif du == 1:
                  all_delu_dict[du] = du
              else:
                  all_delu_dict[du] = delu_default
  
          return all_delu_dict
docs: Sets all chemical potential values and returns a dictionary where
              the key is a sympy Symbol and the value is a float (chempot).
  
          Args:
              entry (SlabEntry): Computed structure entry of the slab
              delu_dict (Dict): Dictionary of the chemical potentials to be set as
                  constant. Note the key should be a sympy Symbol object of the
                  format: Symbol("delu_el") where el is the name of the element.
              delu_default (float): Default value for all unset chemical potentials
  
          Returns:
              Dictionary of set chemical potential values