使用json将json字符串转换为List<List<String>

import json

def json_to_list(json_str):
    data = json.loads(json_str)
    result = []
    
    for item in data:
        sublist = []
        for value in item:
            sublist.append(str(value))
        result.append(sublist)
    
    return result

# 示例用法
json_str = '[["A", "B", "C"], ["D", "E", "F"], ["G", "H", "I"]]'
result = json_to_list(json_str)
print(result)

[['A', 'B', 'C'], ['D', 'E', 'F'], ['G', 'H', 'I']]