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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 get_connection(connection='', engine_name=None, connection_type='long', **args):
 """ Creating an NamedEngine or just return existed engine instance if '://' include in connection parameter, it'll create new engine object otherwise return existed engine isntance """

    engine_name = engine_name or __default_engine__
    if '://' in connection:
        d = {
            'connection_string':connection,
            'connection_args':args,
            'connection_type':connection_type,
            }
        
        return engine_manager.add(engine_name, d).engine
    else:
        connection = connection or __default_engine__
        if connection in engine_manager:
            return engine_manager[connection].engine
        else:
            raise Error("Can't find engine %s" % connection)