utils.py

import jupytext
import os
import tempfile

def convert_file(input_file, output_format, config):
    with tempfile.TemporaryDirectory() as temp_dir:
        base_name = os.path.splitext(input_file.name)[0]
        output_file = os.path.join(temp_dir, f"{base_name}.{output_format}")
        content = input_file.getvalue()
        input_format = os.path.splitext(input_file.name)[1][1:]

        read_options = {}
        write_options = {}
        
        if input_format in ["py", "md"]:
            read_options["fmt"] = f"{input_format}:{config['py_format']}" if input_format == "py" else input_format
            notebook = jupytext.reads(content.decode(), **read_options)
        else:
            notebook = jupytext.reads(content, fmt=input_format)

        if output_format == "py":
            write_options["fmt"] = f"{output_format}:{config['py_format']}"
            if config["comment_magics"]:
                write_options["comment_magics"] = True
        elif output_format == "ipynb":
            write_options["fmt"] = output_format
        else:
            write_options["fmt"] = output_format

        jupytext.write(notebook, output_file, **write_options)
        
        with open(output_file, "rb") as f:
            converted_content = f.read()
        
        return converted_content, f"{base_name}.{output_format}"