How to append in a json file in Python

Question

I have the a json file whose contents is   67790     1     kwh   319 4     Now I create a dictionary a dict which I need to append it into the json file  I tried the following but was not able to do it correctly  Where I m going wrong   with open DATA FILENAME   a   as f     json obj   json dump a dict  json load f     f write json obj     f close

User · Answer

json obj json dumps a dict  ensure ascii False

User · Answer

Assuming you have a test json file with the following content     67790     1     kwh   319 4      Then  the code below will load the json file  update the data inside using dict update   and dump into the test json file   import json  a dict     new key    new value    with open  test json   as f      data   json load f   data update a dict   with open  test json    w   as f      json dump data  f    Then  in test json  you ll have     new key    new value    67790     1     kwh   319 4      Hope this is what you wanted

User · Answer

You need to update the output of json load with a dict and then dump the result  And you cannot append to the file but you need to overwrite it

[python] How to append in a json file in Python?

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