code: def load_conditions(self) -> None:
          
          hydpy.pub.conditionmanager.currentdir = strip(
              self.find('inputdir').text)
          for element in self.master.elements:
              element.model.sequences.load_conditions()
docs: Load the condition files of the |Model| objects of all |Element|
          objects returned by |XMLInterface.elements|:
  
          >>> from hydpy.core.examples import prepare_full_example_1
          >>> prepare_full_example_1()
  
          >>> from hydpy import HydPy, TestIO, XMLInterface
          >>> hp = HydPy('LahnH')
          >>> with TestIO():
          ...     hp.prepare_network()
          ...     hp.init_models()
          ...     interface = XMLInterface('single_run.xml')
          ...     interface.update_timegrids()
          ...     interface.find('selections').text = 'headwaters'
          ...     interface.conditions_io.load_conditions()
          >>> hp.elements.land_lahn_1.model.sequences.states.lz
          lz(8.18711)
          >>> hp.elements.land_lahn_2.model.sequences.states.lz
          lz(nan)