I'm getting an exception when parsing JSON

Question

I'm making a program for saving passwords (only for me)

with open(file, mode='w', encoding='Latin-1') as FA:
    try:
        FAJ = json.load(FA)
    except Exception:
        tafa = {tarr[0]: {'login': tarr[1], 'password': tarr[2]}}
        json.dump(tafa, FA)
    else:
        FAJ[tarr[0]] = {'login': tarr[1], 'password': tarr[2]}
        json.dump(FAJ, FA)
    finally:
        FAJ.close()
        time.sleep(1.5)
        os.system('pause')
        menu()

I'm trying to catch an error and check if the file is empty. But even if file is not empty it anyways throws exception. Does anyone know what could be a problem?

An empty file contains nothing. That's not valid json and will cause a JSONDecodeError. — Håken Lid, Mar 03 '18 at 20:15
The error is in the `json` module. It's not a builtin. `json.JSONDecodeError` — Håken Lid, Mar 04 '18 at 01:38

score 2 · Answer 1 · answered Mar 03 '18 at 22:07

2

You open your file for writing: open(file, mode='w', ...). You cannot read from it, and it also truncates the file. Remove the mode parameter. The default open behavior is to open the file for reading.

answered Mar 03 '18 at 22:07

DYZ

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It's mean what I need open two files ? which I'll be use as json.dump and json.load ? – crousap Mar 04 '18 at 00:55

I'm getting an exception when parsing JSON

1 Answers1