合并&在python3.6中把两个jsonl(json行)文件写成一个新的jsonl文件。

Question

你好，我有两个 jsonl 这样的文件。

one.jsonl

{"name": "one", "description": "testDescription...", "comment": "1"}
{"name": "two", "description": "testDescription2...", "comment": "2"}

second.jsonl

{"name": "eleven", "description": "testDescription11...", "comment": "11"}
{"name": "twelve", "description": "testDescription12...", "comment": "12"}
{"name": "thirteen", "description": "testDescription13...", "comment": "13"}

而我的目标是写一个新的 jsonl 文件名 merged_file.jsonl 它的样子是这样的。

{"name": "one", "description": "testDescription...", "comment": "1"}
{"name": "two", "description": "testDescription2...", "comment": "2"}
{"name": "eleven", "description": "testDescription11...", "comment": "11"}
{"name": "twelve", "description": "testDescription12...", "comment": "12"}
{"name": "thirteen", "description": "testDescription13...", "comment": "13"}

我的方法是这样的

import json
import glob

result = []
for f in glob.glob("folder_with_all_jsonl/*.jsonl"):
    with open(f, 'r', encoding='utf-8-sig') as infile:
        try:
            result.append(extract_json(infile)) #tried json.loads(infile) too
        except ValueError:
            print(f)

#write the file in BOM TO preserve the emojis and special characters
with open('merged_file.jsonl','w', encoding= 'utf-8-sig') as outfile:
    json.dump(result, outfile)

但是我遇到了这个错误:TypeError: Object of type generator is not JSON serializable 我将感激你的提示，以任何方式帮助。谢谢你！我看了其他的SO repos，他们都在写正常的json文件。我看了其他的SO repos，他们都是写普通的json文件，在我的情况下应该也能用，但它一直失败。

读取单个文件像这样的工作。

data_json = io.open('one.jsonl', mode='r', encoding='utf-8-sig') # Opens in the JSONL file
data_python = extract_json(data_json)
for line in data_python:
    print(line)

####outputs####
#{'name': 'one', 'description': 'testDescription...', 'comment': '1'}
#{'name': 'two', 'description': 'testDescription2...', 'comment': '2'}

Answer 1

有可能extract_json返回的是一个生成器而不是listdict，因为它是jsonl，所以是json可序列化的，也就是说每一行都是有效的json，所以你只需要调整一下你现有的代码。

import json
import glob

result = []
for f in glob.glob("folder_with_all_jsonl/*.jsonl"):
    with open(f, 'r', encoding='utf-8-sig') as infile:
        for line in infile.readlines():
            try:
                result.append(json.loads(line)) # read each line of the file
            except ValueError:
                print(f)

# This would output jsonl
with open('merged_file.jsonl','w', encoding= 'utf-8-sig') as outfile:
    #json.dump(result, outfile)
    #write each line as a json
    outfile.write("\n".join(map(json.dumps, result)))

现在我想起来了，你甚至不需要用json来加载它，除了它能帮助你消毒任何格式不好的json行之外，就是所有的了

你可以像这样把所有的线都集中在一个镜头里。

outfile = open('merged_file.jsonl','w', encoding= 'utf-8-sig')
for f in glob.glob("folder_with_all_jsonl/*.jsonl"):
    with open(f, 'r', encoding='utf-8-sig') as infile:
        for line in infile.readlines():
            outfile.write(line)
outfile.close()

Answer 2

如果你不在乎json验证，还有一个超级简单的方法可以做到这一点

cat folder_with_all_jsonl/*.jsonl > merged_file.jsonl