Editing a dict. within a json file-CodePudding

I need to edit a object within a dict that is located inside a json file. but whenever I attempt to do it, it would delete the entire json file and only add the thing I've edited.

Here's my function.

async def Con_Manage(keys):
    with open('keys.json') as config_file:
        config = json.load(config_file)[keys]
    try:
        Current_Con = config["curCons"]   1
        with open('keys.json', 'w') as config_file:
            json.dump(Current_Con, config_file)
        
        return True
    except:
        return False

heres my json file before i run it

{
    "key1": {
        "time": 1500,
        "maxCons": 15,
        "curCons": 2,
        "coolDown": 2
    }
}

and here's what it looks like after its ran

is there any way that i can run this and not delete all my progress?

CodePudding user response：

config["curCons"] gets you just the value which you then increment it and assign to Current_Con. Instead you need to increment and set the value to 1. From there you would want to save the entire json object that you just read in and not just the value that was updated.

async def Con_Manage(keys):
    with open('keys.json') as config_file:
        config = json.load(config_file)
    try:
        config[keys]["curCons"]  = 1 # mutates the value in place 
        with open('keys.json', 'w') as keys:
            json.dump(config, keys) # saves the entire dict not just the value
        return True
    except:
        return False

CodePudding user response：

You need to be writing the entire config file

you can do something like this...

with open('keys.json') as config_file:
    config = json.load(config_file)

for key in keys:
    try:
        config[key]["curCons"]  = 1
    except KeyError:
        pass

with open('keys.json', 'w') as config_file:
    json.dump(config, config_file)