我如何遍历一系列的映射，以获得所有的终结值？

def traverse_mappings(mappings):
    terminations = []
    for mapping in mappings:
        for key, value in mapping.items():
            if isinstance(value, dict):
                terminations.extend(traverse_mappings([value]))
            else:
                terminations.append(value)
    return terminations

# 示例用法
mappings = [
    {"key1": "value1"},
    {"key2": {"key3": "value2"}},
    {"key4": "value3"}
]
result = traverse_mappings(mappings)
print(result)