[Python] How to overcome TypeError: Object of type datetime is not JSON serializable

PreFile :

PreFile = {
"Preferences": {
"Quotas": {
"Rate limit": 0,
"Reset time": "2020-10-28 10:57:21.482911"
}
}
}


My code:

PrefFile["Preferences"]["Quotas"]["Reset time"] = data_option
with open(Preferences_Path, 'w') as Preferences_File:
json.dump(PrefFile, Preferences_File, indent=4, sort_keys=True)


PreResetTime = PreFile["Preferences"]["Quotas"]["Reset time"]
ResetTime = datetime.strptime(PreResetTime, '%Y-%m-%d %H:%M:%S.%f')


Error output: TypeError: Object of type datetime is not JSON serializable

File "main_functions.py", line 158, in updating_preferences
json.dump(PrefFile, Preferences_File, indent=4, sort_keys=True)


I'm going to use ResetTime later in the program

if(ResetTime < (time_now - timedelta(hours=24))):
code...

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