def keys(self):
        return list(self.data.keys())
Copy the firefox/xulrunner runtime to a new folder, in which
dataset/ETHPy150Open nathangrigg/dayone_export/dayone_export/__init__.py/Entry.keys--crossover with--dataset/ETHPy150Open zoofIO/flexx/flexx/webruntime/xul.py/copy_xul_runtime