code: def set_input(self, name, value):
          
  
          if self._lxml_form is None:
              self.choose_form_by_element('.//*[@name="%s"]' % name)
          elem = self.form.inputs[name] # pylint: disable=no-member
  
          processed = False
          if getattr(elem, 'type', None) == 'checkbox':
              if isinstance(value, bool):
                  elem.checked = value
                  processed = True
  
          if not processed:
              # We need to remember original values of file fields
              # Because lxml will convert UploadContent/UploadFile object to
              # string
              if getattr(elem, 'type', '').lower() == 'file':
                  self._file_fields[name] = value
                  elem.value = ''
              else:
                  elem.value = value
docs: Set the value of form element by its `name` attribute.
  
          :param name: name of element
          :param value: value which should be set to element
  
          To check/uncheck the checkbox pass boolean value.
  
          Example::
  
              g.set_input('sex', 'male')
  
              # Check the checkbox
              g.set_input('accept', True)