Convert CSV to Excel Script

I need a small, clean Python script that reads one or more CSV files and writes them out as XLSX workbooks. The job is straightforward: rely on Pandas (NumPy is fine to import as well) for the heavy lifting, keep external dependencies to a minimum, and make sure the result opens flawlessly in Excel.

Here is what I expect:
• A well-commented .py file that takes an input path (single file or folder) and outputs the converted workbook(s) to a chosen directory.
• A short README or inline usage notes so I can run the script from the command line without guesswork.
• Sensible error handling—for example, if a CSV is malformed, the script should log the issue and continue processing the remaining files.

If you have a quick question about edge cases—large files, unusual delimiters, multiple worksheets—feel free to ask before you dive in. Once the script passes a quick test on my sample data, I’ll release the milestone right away.