heart_control/MicroWebSrv/upload_dat.py

import json
class Upload():
    def __init__(self) -> None:
        self.dat = {}
    
    def set_data(self, key, value):
        if key in self.dat:
            self.dat[key] = value
        else:
            self.dat.update({key:value})
    
    def get_status(self):
        return json.dumps(self.dat)

upload = Upload()