question of code

[hjvhj]

What is the format in "flow "of " def _build_feature_from_flow(self, flow)"

[alekzandr]

that's the output of build_sessions()

For example:

 def build_feature_dataframe(self):        
        
        
        self._sessions = self.build_sessions()
        ...
        pool = Pool()

        self._frames = pool.map(self._build_feature_from_flow, self._sessions)
        ...

the pooling will pass self.sessions as input to the _build_feature_from_flow function.