Hello, the file you want to convert with an NPY extension is a Numpy array file. Numpy is a Python library. I can create a Python script for you that will allow you to convert NPY file to CSV on the command-line. You have to pass the name of the file you want to convert and it will save that file with the same name to CSV file.
About Me
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I'm a Python developer. I use Python extensively to create command-line tools. I also build web scrapers, web crawlers, and webbots in Python and PHP.