如何使用Python填充属于另一个列表的列表中的缺失值？

def fill_missing_values(data, missing_value):
    for i in range(len(data)):
        for j in range(len(data[i])):
            if data[i][j] == missing_value:
                data[i][j] = fill_value
    return data

# 示例用法
data = [[1, 2, 3], [4, None, 6], [7, 8, None]]
missing_value = None
fill_value = 0

filled_data = fill_missing_values(data, missing_value)
print(filled_data)

[[1, 2, 3], [4, 0, 6], [7, 8, 0]]

def fill_missing_values(data, missing_value, fill_value):
    return [[fill_value if val == missing_value else val for val in sublist] for sublist in data]

# 示例用法
data = [[1, 2, 3], [4, None, 6], [7, 8, None]]
missing_value = None
fill_value = 0

filled_data = fill_missing_values(data, missing_value, fill_value)
print(filled_data)

[[1, 2, 3], [4, 0, 6], [7, 8, 0]]