多个json结构，如何分别格式化输出

linlone

我有多个独立的json结构：

1. {"first_key": "value", "second_key": "value2"}
   
2. {"third_key": "value3", "forth_key": "value4"}

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希望各自独立输出成多个json结构：

1. {
   
2.     "first_key": "value",
   
3.     "second_key": "value2"
   
4. }
   
5. {
   
6.     "third_key": "value3",
   
7.     "forth_key": "value4"
   
8. }

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目前知道一个json结构是没问题的，但多个就不行了

1. $ echo '{"first_key": "value", "second_key": "value2"}' | python -mjson.tool
   
2. {
   
3.     "first_key": "value",
   
4.     "second_key": "value2"
   
5. }
   

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jason680

回复 1# linlone

$ cat a.json
{"first_key": "value", "second_key": "value2"}
{"third_key": "value3", "forth_key": "value4"}

$ while read line;do echo "$line" | python -mjson.tool; done < a.json
{
    "first_key": "value",
    "second_key": "value2"
}
{
    "forth_key": "value4",
    "third_key": "value3"
}

   

linlone

回复 2# jason680


    我想尝试用xargs，但为啥不行呢？

1. echo '
   
2. {"first_key": "value", "second_key": "value2"}
   
3. {"third_key": "value3", "forth_key": "value4"}
   
4. ' | xargs -i python -mjson.tool {}

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zxy877298415

1. awk '{gsub(/[{,]/,"&\n   ",$0);sub("}","\n&",$0)}1' file  
   
2. {
   
3.    "first_key": "value",
   
4.     "second_key": "value2"
   
5. }
   
6. {
   
7.    "third_key": "value3",
   
8.     "forth_key": "value4"
   
9. }

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回复 1# linlone


   

moperyblue

more file

1. {"first_key": "value", "second_key": "value2"}
   
2. {"third_key": "value3", "forth_key": "value4"}

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1. sed 's/[{,]/&\n\t/g;s/}/\n&/;' file

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{
        "first_key": "value",
         "second_key": "value2"
}
{
        "third_key": "value3",
         "forth_key": "value4"
}

可以用jq工具 方便快捷

1. jq . file

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{
  "second_key": "value2",
  "first_key": "value"
}
{
  "forth_key": "value4",
  "third_key": "value3"
}

linlone

以上两位给的awk和sed方案都不错，但我的理解能力有限，担心以后维护困难。

我还是想使用xargs来实现，但下面的命令出错了：

1. echo '{"first_key": "value", "second_key": "value2"}
   
2. {"third_key": "value3", "forth_key": "value4"}' | xargs -i python -mjson.tool {}

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错误信息是：

1. Traceback (most recent call last):
   
2.   File "/usr/lib64/python2.6/runpy.py", line 122, in _run_module_as_main
   
3.     "__main__", fname, loader, pkg_name)
   
4.   File "/usr/lib64/python2.6/runpy.py", line 34, in _run_code
   
5.     exec code in run_globals
   
6.   File "/usr/lib64/python2.6/json/tool.py", line 37, in <module>
   
7.     main()
   
8.   File "/usr/lib64/python2.6/json/tool.py", line 21, in main
   
9.     infile = open(sys.argv[1], 'rb')
   
10. IOError: [Errno 2] No such file or directory: '{first_key: value, second_key: value2}'
    
11. xargs: python: exited with status 255; aborting
    

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linlone

我的解决方案

1. 
   
2. $ online_out='{"first_key": "value", "second_key": "value2"}
   
3. {"third_key": "value3", "forth_key": "value4"}'
   
4. 
   
5. $ while read line; do
   
6.     echo "$line" | python -mjson.tool;
   
7. done <<< "$online_out"
   
8. 
   
9. {
   
10.     "first_key": "value",
    
11.     "second_key": "value2"
    
12. }
    
13. {
    
14.     "forth_key": "value4",
    
15.     "third_key": "value3"
    
16. }
    
17. 
    
18. $ while read line; do
    
19. >     echo "$line" | python -mjson.tool;
    
20. > done <<< "$online_out" > online.txt
    
21. 
    
22. $ cat online.txt
    
23. {
    
24.     "first_key": "value",
    
25.     "second_key": "value2"
    
26. }
    
27. {
    
28.     "forth_key": "value4",
    
29.     "third_key": "value3"
    
30. }
    

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