code: def get_target_variable(self, targets, variable):
          
          if isinstance(targets, str):
              targets = [targets]
          assert is_iterable(targets)
          assert isinstance(variable, basestring)
  
          return bjam_interface.call('get-target-variable', targets, variable)
docs: Gets the value of `variable` on set on the first target in `targets`.
  
          Args:
              targets (str or list): one or more targets to get the variable from.
              variable (str): the name of the variable
  
          Returns:
               the value of `variable` set on `targets` (list)
  
          Example:
  
              >>> ENGINE = get_manager().engine()
              >>> ENGINE.set_target_variable(targets, 'MY-VAR', 'Hello World')
              >>> ENGINE.get_target_variable(targets, 'MY-VAR')
              ['Hello World']
  
          Equivalent Jam code:
  
              MY-VAR on $(targets) = "Hello World" ;
              echo [ on $(targets) return $(MY-VAR) ] ;
              "Hello World"