<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def restore_defaults_ratio(self):
 """Restore InaSAFE default ratio."""

        # Set the flag to true because user ask to.
        self.is_restore_default = True
        # remove current default ratio
        for i in reversed(list(range(self.container_layout.count()))):
            widget = self.container_layout.itemAt(i).widget()
            if widget is not None:
                widget.setParent(None)

        # reload default ratio
        self.restore_default_values_page()