python - python中如何将多个json文件合并为一个文件

Question

我想在python中将多个json文件合并到一个文件中。我想做的事情是如果有几个 .json 文件，例如:

# temp1.json
[{'num':'1', 'item':'smartphone','data':'2019-01-01'},
{'num':'2', 'item':'smartphone','data':'2019-01-02'},
{'num':'3', 'item':'smartphone','data':'2019-01-03'},
{'num':'4', 'item':'smartphone','data':'2019-01-04'}]

# temp2.json
[{'num':'5', 'item':'smartphone','data':'2019-01-05'},
{'num':'6', 'item':'smartphone','data':'2019-01-06'},
{'num':'7', 'item':'smartphone','data':'2019-01-07'}]

# temp3.json
[{'num':'8', 'item':'smartphone','data':'2019-01-08'},
{'num':'9', 'item':'smartphone','data':'2019-01-09'},
{'num':'10', 'item':'smartphone','data':'2019-01-10'},
{'num':'11', 'item':'smartphone','data':'2019-01-11'},
{'num':'12', 'item':'smartphone','data':'2019-01-12'}]

我想要获取的 result.json 文件应该如下所示:

# result.json
[{'num':'1', 'item':'smartphone','data':'2019-01-01'},
{'num':'2', 'item':'smartphone','data':'2019-01-02'},
{'num':'3', 'item':'smartphone','data':'2019-01-03'},
{'num':'4', 'item':'smartphone','data':'2019-01-04'},
{'num':'5', 'item':'smartphone','data':'2019-01-05'},
{'num':'6', 'item':'smartphone','data':'2019-01-06'},
{'num':'7', 'item':'smartphone','data':'2019-01-07'},
{'num':'8', 'item':'smartphone','data':'2019-01-08'},
{'num':'9', 'item':'smartphone','data':'2019-01-09'},
{'num':'10', 'item':'smartphone','data':'2019-01-10'},
{'num':'11', 'item':'smartphone','data':'2019-01-11'},
{'num':'12', 'item':'smartphone','data':'2019-01-12'}]

我得到的result.json文件是:

# result.json
[[{'num':'1', 'item':'smartphone','data':'2019-01-01'},
{'num':'2', 'item':'smartphone','data':'2019-01-02'},
{'num':'3', 'item':'smartphone','data':'2019-01-03'},
{'num':'4', 'item':'smartphone','data':'2019-01-04'}],
[{'num':'5', 'item':'smartphone','data':'2019-01-05'},
{'num':'6', 'item':'smartphone','data':'2019-01-06'},
{'num':'7', 'item':'smartphone','data':'2019-01-07'}],
[{'num':'8', 'item':'smartphone','data':'2019-01-08'},
{'num':'9', 'item':'smartphone','data':'2019-01-09'},
{'num':'10', 'item':'smartphone','data':'2019-01-10'},
{'num':'11', 'item':'smartphone','data':'2019-01-11'},
{'num':'12', 'item':'smartphone','data':'2019-01-12'}]]

我使用代码合并来自 here 的 .json 文件并将其稍微更改如下:

files=['my.json','files.json',...,'name.json']

def merge_JsonFiles(filename):
    result = list()
    for f1 in filename:
        with open(f1, 'r') as infile:
            result.append(json.load(infile))

    with open('counseling3.json', 'w') as output_file:
        json.dump(result, output_file)

merge_JsonFiles(files)

我已经阅读了几个相关问题，但没有我需要的答案。谁能帮我吗？

Answer 1

您应该使用extend而不是append。它将把传递的列表中的项目添加到结果而不是新列表中:

files=['my.json','files.json',...,'name.json']

def merge_JsonFiles(filename):
    result = list()
    for f1 in filename:
        with open(f1, 'r') as infile:
            result.extend(json.load(infile))

    with open('counseling3.json', 'w') as output_file:
        json.dump(result, output_file)

merge_JsonFiles(files)