How can I ensure that values are appended to a list in a JSON file without being overwritten every time the server is re-run?
{ "heart_rate": [ 72.18 ], "Experiment_time": [ 01/22/2023 11:59:59 ] }
I need new values to be added to the JSON file, so that each time a new value is obtained, it gets appended to the heartrate and Experiment_time lists under their corresponding keys, following the format shown below.
{ "heart_rate": [ 72.18,73.44 ], "Experiment_time": [ 01/22/2023 11:59:59,01/22/2023 11:60:00 ] }
My approach involves checking if the JSON file already exists, and creating one if it doesn't.
try:
with open('Accounts.json','r') as fp:
data = json.load(fp)
f = data
print(f)
heartrate,dt_string = perform_all()
lst1 = []
if f != '':
print("something")
else:
lst1.append(heartrate)
except :
print("File Not found. Creating One")
data = {}
data['heart_rate'] = [None]
data['Experiment_time'] = [None]
with open('Accounts.json','w') as fp:
json.dump(data,fp,indent = 4)
heartrate,dt_string = perform_all()
The function above returns one value of heart rate and one value of date-time when called.