Json overwriting itself in Python

Question

I am giving a try in backend and I am failing in parsing Twitters stream API. I want to create Json file with timestamp, name, tweet and screen name. That seems to be working. But when I try to write it in file - entry overwrites already existing one. It does not continues. I red here that for some outfile.write('\n') worked. Tried and still new entry overwrites previous one

    with open('text2', 'w') as outfile:
        json.dump({'time': time.time(), 'screenName': screenName, 'text': text, 'name': name}, outfile, indent = 4, sort_keys=True)
        outfile.write('\n')

possible duplicate of [How do you append to file in python?](http://stackoverflow.com/questions/4706499/how-do-you-append-to-file-in-python) — RomanHotsiy, Jul 16 '14 at 14:37
no, it's not. You can't append content to a json file like it would be a txt. — Alex M.M., Feb 24 '20 at 11:54

score 2 · Accepted Answer · answered Jul 16 '14 at 14:38

2

When you open the file use a (append) instead of w (write).

https://docs.python.org/2/library/functions.html#open

answered Jul 16 '14 at 14:38

Holloway

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Well, the resulting content in `test2` is no valid JSON anymore. That should be kept in mind. – Boldewyn Jul 16 '14 at 14:47
@Boldewyn and how to add consatntly new Json objects and still get valid Json? – andris Jul 16 '14 at 15:21
2

Build the object in memory (e.g. as a list or dict) containing all the entries and serialize it all at once. – kindall Jul 16 '14 at 15:44

Json overwriting itself in Python

1 Answers1