【json int型key处理还原】json在编码保存时将int保存为str，解码读取时候手动还原

import json

def convert_json_key(param_dict):
    """
    json.dump不支持key是int的dict，在编码存储的时候会把所有的int型key写成str类型的
    所以在读取json文件后，用本方法将所有的被解码成str的int型key还原成int
    """
    new_dict = dict()
    for key, value in param_dict.items():
        if isinstance(value, (dict,)):
            res_dict = convert_json_key(value)
            try:
                new_key = int(key)
                new_dict[new_key] = res_dict
            except:
                new_dict[key] = res_dict
        else:
            try:
                new_key = int(key)
                new_dict[new_key] = value
            except:
                new_dict[key] = value

    return new_dict

if __name__ == '__main__':
	f = open('./json', 'r')
	file_dict = json.load(f)	# 此时本该是int型的key会变成str
	file_dict = convert_json_key(file_dict)		# 将本该是int型的key转回int
	print(file_dict)
	f.close()