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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def save_file(self, filename, text):
 """Save the given text under the given condition filename and the current path. If the current directory is not defined explicitly, the directory name is constructed with the actual simulation end date. If such an directory does not exist, it is created immediately. """

        _defaultdir = self.DEFAULTDIR
        try:
            if not filename.endswith('.py'):
                filename += '.py'
            try:
                self.DEFAULTDIR = (
                    'init_' + hydpy.pub.timegrids.sim.lastdate.to_string('os'))
            except AttributeError:
                pass
            path = os.path.join(self.currentpath, filename)
            with open(path, 'w', encoding="utf-8") as file_:
                file_.write(text)
        except BaseException:
            objecttools.augment_excmessage(
                'While trying to write the conditions file `%s`'
                % filename)
        finally:
            self.DEFAULTDIR = _defaultdir