Parallel decryption and encryption with GPG in Python

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For a project I needed to decrypt thousands of OpenPGP-encrypted files using Python. This is a task that can be easily sped up by the means of parallel processing to use all the CPU cores in your machine. This can be implemented using for example Python’s multiprocessing Pool. However, the implementation was not as straight forward as I thought. Let’s start with an UTF-8 encoded plain…

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