Saving to Json file

[Shambob1874]

Hi all , I've saved the results from my menu to json. when i click on the saved file it looks like it is only saving 1 dictionary and then overwriting it the next time the programme is run and the menu has new selections.
This is the code i have written. Thanks in advance.

data = {}
data['batch_number'] = []
data['batch_number'].append({'batch_number':str(batch_number)})
with open('fruitBatches.json', 'w') as outfile:
    json.dump(data, outfile)
    i = 0
    while i < len(batch_number):
        print("list index is ", i)
        print("value is ", batch_number[i])
        i = i + 1

[micseydel]

That's the expected behavior. If you want different behavior, you should have your highest level data structure be a list instead of a dictionary, and then in order to add to the file you'll have to read its previous contents into memory, append to that, then dump it again. (You probably want to be mindful of the case of the file not existing the first time as well, when you would read it.)