Replicating MNE default filter using scipy

Hi - I would like to replicate the MNE default / ‘auto’ filter settings using scipy. It was difficult for me to parse the source code here, and I’m wondering if anyone has compared designed an identical filter using scipy and compared the outputs? The reason for this is that I’m attempting to filter an on-line EEG signal in chunks, and I’d like to use the default MNE filter settings to compare the filtered signal done in its entirety vs. done piecewise. Thanks!