Convert string to bytes in Python

Minimal Python examples of how to convert string to bytes and vice versa.
Let’s start Python REPL and experiment.

$ python3
Python 3.7.0 (default, Jul 3 2018, 23:47:55)
[Clang 9.0.0 (clang-900.0.39.2)] on darwin
Type "help", "copyright", "credits" or "license" for more information.

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Getting Started with JSON Web Tokens and Python

JSON Web Token is an open standard that defines a way for securely transmitting JSON objects. The JSON object can be verified and trusted because it’s digitally signed. The JSON web tokens can be signed by using a secret with the HMAC algorithm or by public / private key pair using RSA.

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