import json, os
DB='memory.json'
def _load():
    if os.path.exists(DB):
        try:
            return json.load(open(DB,'r',encoding='utf-8'))
        except:
            return []
    return []
def _save(data):
    json.dump(data, open(DB,'w',encoding='utf-8'), indent=2)
def store(entry):
    data=_load(); data.append({'ts':__import__('datetime').datetime.utcnow().isoformat(),'entry':entry}); _save(data)
def recall(limit=100):
    data=_load(); return data[-limit:]
def clear():
    _save([])