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Summary
Fix a "TypeError" in "gen-templates" when an explicit "--folder" is provided by converting the folder string to "pathlib.Path".
Problem
When --folder is explicitly provided, templates_folder remains a string. The command later constructs the output path using:
templates_folder / rot / fname
This raises:
TypeError: unsupported operand type(s) for /: 'str' and 'str'
The error occurs after template simulation and aggregation, immediately before saving the generated HDF5 file.
Reproduction
mearec gen-templates
--n 1
--probe Neuronexus-32
--seed 0
--folder /tmp/mearec-templates
--fname smoke_templates.h5
Testing
Verified on Python 3.12.3 and MEArec 1.11.0. The command now completes successfully and saves the generated HDF5 template file.