Issue with reading .pl2 files

[Bosswang12138]

Hello everyone,

I'm trying to use the spikeinterface.extractors.read_plexon2() function to read a .pl2 file using the following code:

import spikeinterface.extractors as se from pathlib import Path

folderPath = Path(r"D:\PROGRAM") filename = Path("16ch1.pl2") fullfilename = folderPath.joinpath(filename)

recording = se.read_plexon2(file_path=fullfilename, stream_id='6')

However, I'm facing the following error:

---

ArgumentError Traceback (most recent call last)

File d:\Anaconda\envs\si_env\lib\site-packages\spikeinterface\extractors\neoextractors\plexon2.py:30, in Plexon2RecordingExtractor.init(self, file_path, stream_id, stream_name, all_annotations) 28 def init(self, file_path, stream_id=None, stream_name=None, all_annotations=False): 29 neo_kwargs = self.map_to_neo_kwargs(file_path) ---> 30 NeoBaseRecordingExtractor.init( 31 self, stream_id=stream_id, stream_name=stream_name, all_annotations=all_annotations, **neo_kwargs 32 ) 33 self._kwargs.update({"file_path": str(file_path)})

File d:\Anaconda\envs\si_env\lib\site-packages\spikeinterface\extractors\neoextractors\neobaseextractor.py:185, in NeoBaseRecordingExtractor.init(self, stream_id, stream_name, block_index, all_annotations, use_names_as_ids, neo_kwargs) 156 def init( 157 self, 158 stream_id: Optional[str] = None, (...) 163 neo_kwargs: Dict[str, Any], 164 ) -> None: 165 """ 166 Initialize a NeoBaseRecordingExtractor instance. 167 (...) 182 183 """ --> 185 _NeoBaseExtractor.init(self, block_index, **neo_kwargs) 187 kwargs = dict(all_annotations=all_annotations) 188 if block_index is not None:

File d:\Anaconda\envs\si_env\lib\site-packages\spikeinterface\extractors\neoextractors\neobaseextractor.py:25, in _NeoBaseExtractor.init(self, block_index, neo_kwargs) 23 def init(self, block_index, neo_kwargs): 24 if not hasattr(self, "neo_reader"): # Avoid double initialization ---> 25 self.neo_reader = self.get_neo_io_reader(self.NeoRawIOClass, **neo_kwargs) 27 if self.neo_reader.block_count() > 1 and block_index is None: 28 raise Exception( 29 "This dataset is multi-block. Spikeinterface can load one block at a time. " 30 "Use 'block_index' to select the block to be loaded." 31 )

File d:\Anaconda\envs\si_env\lib\site-packages\spikeinterface\extractors\neoextractors\neobaseextractor.py:64, in _NeoBaseExtractor.get_neo_io_reader(cls, raw_class, neo_kwargs) 62 neoIOclass = getattr(rawio_module, raw_class) 63 neo_reader = neoIOclass(neo_kwargs) ---> 64 neo_reader.parse_header() 66 return neo_reader

File d:\Anaconda\envs\si_env\lib\site-packages\neo\rawio\baserawio.py:178, in BaseRawIO.parse_header(self) 165 def parse_header(self): 166 """ 167 This must parse the file header to get all stuff for fast use later on. 168 (...) 176 177 """ --> 178 self._parse_header() 179 self._check_stream_signal_channel_characteristics()

File d:\Anaconda\envs\si_env\lib\site-packages\neo\rawio\plexon2rawio\plexon2rawio.py:239, in Plexon2RawIO._parse_header(self) 237 for spike_channel_idx, spike_header in enumerate(self.header['spike_channels']): 238 schannel_name = spike_header['name'].split('.')[0] --> 239 schannel_info = self.pl2reader.pl2_get_spike_channel_info_by_name(schannel_name) 241 spiketrain_an = seg_ann['spikes'][spike_channel_idx] 242 for key in spike_annotation_keys:

File d:\Anaconda\envs\si_env\lib\site-packages\neo\rawio\plexon2rawio\pypl2\pypl2lib.py:651, in PyPL2FileReader.pl2_get_spike_channel_info_by_name(self, channel_name) 642 self.pl2_dll.PL2_GetSpikeChannelInfoByName.memsync = [ 643 { 644 'p': [1], 645 'n': True, # null-terminated string flag 646 } 647 ] 649 pl2_spike_channel_info = PL2SpikeChannelInfo() --> 651 result = self.pl2_dll.PL2_GetSpikeChannelInfoByName(self._file_handle, 652 channel_name, 653 ctypes.byref(pl2_spike_channel_info)) 655 if not result: 656 self._print_error()

ArgumentError: argument 2: TypeError: expected c_char_Array_5 instance instead of bytes

Has anyone encountered a similar issue with the read_plexon2() function or has any suggestions on how to resolve this error?

Any help or guidance would be greatly appreciated. Thank you!

[alejoe91]

Hi,

SpikeInterface uses NEO for IO. Can you open an issue there? https://github.com/NeuralEnsemble/python-neo/issues

[Bosswang12138]

Hi,

SpikeInterface uses NEO for IO. Can you open an issue there? https://github.com/NeuralEnsemble/python-neo/issues

"Hi,

Thank you for your suggestion! I'll open an issue in the NEO repository to address this matter.

Best regards,"